Frequently Asked Questions
Q: We're looking for a product that can detect offline PC and wake them
to do something. I tried to activate the Refresh Status alert action
Wake-On-LAN, but it didn't work.
A. To make Wake-On-LAN action work under monitoring mode, users should
properly set these two Refresh Status options "Monitoring at intervals of"
and "Consider status changed if consecutive". By default these two options
are set to 10 seconds and one time. If the computer requires more than 10
seconds to power off after being shut down, the Wake-On-LAN action will not
work since the computer's power supply is still running. In this case, it's
better to set these two options to 20 seconds and two times, or even more.
Q. How to run this remote administration tool under a non-admin account?
A. On version 1.87 or later, LanHelper provides option for running the
remote administration tool under a non-admin account. Open the configuration file CONFIG.INI
from LanHelper folder, locate this line "RequireAdmin = 1" under General
section, change it to "RequireAdmin = 0", save the file and then launch
LanHelper again. Be aware that without administrative privileges some
features will probably not work.
Q. How to run this remote administration tool on Windows Vista?
A. If User Account Control (UAC) is enabled on Windows Vista, you will
probably get this error "You MUST have administrative privileges to run this
program" while running this remote administration tool, even if you are an administrator. There
are two methods for this issue.
(1) Right click on LanHelper shortcut, then select "Run as Administrator".
(2) Right click on LanHelper shortcut, select "Properties", under the
Compatibility tab, check "Run as Administrator", then click Ok button.
Q. The target computer was running, but I got this error "The network
path was not found".
A. There are four possible reasons. On the target computer, (1) Microsoft
Files And Printers Sharing is not installed and enabled. (2) The Server
service is stopped. (3) The SMB (TCP 445) and NetBIOS (TCP 139) protocols
are blocked. (4) At most time you will get this error if the target computer has
a firewall program running.
Q. I often got this error "Access is denied".
A. You should provide correct security credentials ("Network>Security
Credentials") so this remote administration tool can have enough
permissions. For detailed information please
refer to Security Credentials section of the help document.
Q. While using Remote Execute function, I got this error message "you
have not enough permissions or the ADMIN$ has been disabled on xx.xx.xx.xx."
A. There are three possible reasons.
(1) A firewall program is running on remote computer. If so, you will
failed to schedule task or perform other network operations on it. To
evaluate LanHelper, please temporarily disable the firewall, or configure the firewall to
allow incoming traffic on TCP port 445.
(2). You have not enough permissions. In Remote Execute, click "Remote
Logon - Settings" button, select "specify credentials" in Security
Credentials drop-down list and enter an administrator account into
To a Windows XP computer, you may need to configure the Windows XP system so
you can remotely log on to it successfully. On Windows XP system, click
"Control panel>Administrative Tools>Computer Management>Local Security
Policy>Local Policy>Security Options", in the right pane double-click the
item titled "Network access: Sharing and security model for local accounts."
The default option for this is "Guest only - local users authenticate as
Guest." Switch this option to "Classic - local users authenticate as
themselves." If the account that you are using to logon remotely has a
blank password, it's recommended to disable this security option "Accounts: Limit
local account use of blank passwords to console logon only". A restart may be required for the changes to take effect.
Sometimes some policies will cause your network operation failed. On remote
computer's system, click "Control panel>Administrative Tools>Computer
Management>Local Security Policy>Local Policy>User Rights Assignments". In
the right panel, check those items "Access this computer from the network",
"Deny access to this computer from the network", whether the account you
used in LanHelper have been added to them.
(3). The remote computers should have these two shares: ADMIN$, IPC$. If
they have been disabled, you ought to enable them just as how they were
disable. You may check them from this remote administration tool's scan results.
Q. Cannot schedule task on remote computers or local one by using Remote
Execute from my Windows XP computer. The error information is "The binding
handle is invalid", the error code is 1702.
But I can schedule task on this computer from other computers.
A. This will happen if the
security update has been installed in your Windows XP system. You can use any
one of the following methods to solve this problem.
(1) In version 1.41 or higher, turn on the Remote Execute
option "Switch IP address to DNS or NetBIOS name for selected machine(s)" in
Options dialog. In early version, specify DNS name or NetBIOS name instead of IP
address in "Computers" field in Remote Execute.
(2) Uninstall the KB835732 hotfix. After a
reboot, you should install the Windows XP Service Pack 2 or higher version
as soon as possible to better protect your computer.
You can learn more about the problem from
(3) Sometimes stopping the Terminal Services will also probably cause this
error. So please start the Terminal Services on target computer and try
Q. After finishing scanning, I found that the number of the returned items in
the main window was often less than the one of the scanned computers displayed at
status bar. Is this normal?
A. This will happen if the scan option "scan online computer only" is turned on.
They will be equal if you turn off this option.
Q. Cannot get anything after scanning network. Or the MAC addresses are all
returned as "00-00-00-00-00-00". Why is this so?
Try one of the following methods.
(1) Restart your computer and try scanning again.
(2) Select "Tools>Options" from the menu bar, click Scan
tab, uncheck the option "Scan online computer only", click OK
button. Then try scanning again.
(3) If the problem persists, you may need to check whether your computer uses
NetBEUI protocol. In Windows 2000/XP, click "Start > Settings > Control Panel >
Network and Internet Connection". Open
Properties of Local Area Connection. If NetBEUI protocol is in the component
list, you may need to uninstall it so the remote administration tool LanHelper will scan normally (DO NOT
uninstall NetBEUI if any program in your computer only uses this protocol). If TCP/IP
protocol is not in it, you must install it.
Q. Why did LanHelper only return the information of my own computer after scanning network?
A. (1) You were using Scan LAN or Scan Workgroup. Please inspect whether your
computer is connected to network normally. Also inspect the network configuration
check whether IP address, subnet mask and so on are configured
(2) You were using Scan IP.
Scan IP function sends ICMP echo request to destination to verify whether an IP
is in use or active. So if the router blocked ICMP traffic, only your own computer or a portion of
the computers in your network would be returned. Many
personal firewall programs installed on PCs would also block ICMP, which make LanHelper unable to scan those
too. In version 1.20 or higher, it would be helpful for Scan IP to find out more
secret targets if you turn on the scan option "Skip ping while scanning IP".
Q. Cannot obtain currently logged-on user name while scanning network.
A. The general reason is that the Messenger
service on remote system was not running. The computer name is probably
returned if the user name was not unique on local network.
Q. Why the Scan IP function cannot scan computers that located outside my LAN?
A. Scan IP function sends ICMP echo request to destination to verify whether an
IP is in use or active. However, many attacks and worm viruses also used ICMP widely.
So hardly all the routers on LAN and WAN had to filter ICMP traffic. This is why
Scan IP function frequently failed to scan other subnet. Now you can
turn on the scan option "Skip ping while scanning IP" and it helps you
retrieve more targets from other subnet, but this would
slow down the speed.
Q. How to get MAC address of the computer that has been turned off?
A. From version 1.46 on, you can get MAC addresses of turned-off computers
or running ones, as long as the network devices within your network, such as router,
switch or xDSL modem, support SNMP MIB-2 and have an IP address. Click
Wake-On-LAN button in toolbar, click "Get MAC from router, switch or modem"
label. Enter IP address of the network device or the gateway into IP Address field and click Get
button. If anything go right, you would get some MAC and IP addresses. In a DHCP
network some duplicate MAC addresses may be returned. Click Add Item button to add those
data to the main window. Click Ok button to add MAC addresses to the list in
Wake-On-LAN dialog and return.
Q. The remote computer doesn't power down as I shut down it remotely. Is this
A. LanHelper (or other similar programs) can not make a Windows NT/2000 system power down by using Remote Shutdown
function. The computer
being shut down remotely will flush all caches to disk, clear the screen, and
then display a message indicating that it is safe to power down. Only the
Windows XP/2003 computer can be powered down remotely. Please refer to
Remote Execute and LanHelper Integrated Command, new features in v1.10, for how to power off Windows 2000/XP/2003 computer on LAN or WAN.
Q. Why cannot I shut down a Windows XP computer by using Remote Shutdown?
A. Windows XP computer failed to be shut down remotely due to the default system
configuration. There are two methods to solve this problem via configuring Windows
of the target computer using the Local Security interface.
(1) Click "Start>Settings>Control Panel>Administrative Tools>Local Security
Policy>Local Policy". Highlight the Security Options item in the left pane. In
the right pane, locate the item titled "Network access: Sharing and security
model for local accounts." The default option for this is the "Guest only -
local users authenticate as Guest." Switch this option to the "Classic - local
users authenticate as themselves." Thus you can log on remotely as a member of
administrators group to shut down this computer by using Remote Shutdown. If the
account you are using to logon remotely has a blank password, it's recommended
to disable this security option "Accounts: Limit local account use of blank
passwords to console logon only".
(2) Click "Start>Settings>Control Panel>Administrative Tools>Local Security
Policy>Local Policy". Highlight the User Rights Assignment item in the left
pane. In the right pane, double-click the item titled "Force shutdown from a
remote system". Click "Add User or Group" button, in "Enter the object names to
select (examples)", type "guest" and click OK. And then click OK again.
Following this, click "Start>Settings>Control Panel>Administrative
Users and Groups>User", in the right pane, double-click the Guest account. In
the general tab of Guest Properties window, click the check box "Account
Disabled" to make it unchecked, and then click OK. Thus anyone can shut down this
computer by using Remote Shutdown without logging on.
A restart may be required for the changes to take effect.
Q. The feature that detects writable shared folders is quite dangerous. The
files and folders in writable shared folders detected by LanHelper may be
destroyed by anyone. What should I do to prevent it happening?
A. At the beginning, I developed this feature to help myself clean the NIMDA
virus on my network. But it might bring danger to the network users if someone
misuses this feature. Anyone can use it to find the writable shared folders on
the network and then modify or erase important data in those folders. To prevent
this happening, use LanHelper to scan your network in time. Before this, make
sure the scan options "shared folders" and "Detect the access to shared folders"
have been turned on. After finishing scanning, select "View>Filter>Writable
Share" from the menu bar, and then only the writable shared folders would be
displayed in the Share column of the list. To the writable shared folders on
Windows 95/98/ME system, you should configure them to be read-only ones or set
password to protect them. To the writable ones on Windows NT/2000/XP, you should
use Access Control List and Permissions Properties to protect them. For detailed
information please refer to Windows help document.
Q. Why the Windows 98 computers cannot receive messages sent from my
A. Under Windows 95/98/ME system, the program Winpopup.exe should be running
to receive messages sent from other computers. To run Winpopup.exe, select Run
from the Start menu to open the Run dialog box. Type "winpopup.exe" in the Open
field and click OK button.
Q. I used Scan IP under Windows XP but found that all the scan results were
badly wrong. Why?
A. This is caused by a bug in Windows XP system. You should install Windows
XP Service Pack 1 or
higher version to fix it. If your Windows XP system doesn't have Service
Pack 1 or higher version installed, please set the value of the scan option "Maximum threads for IP
scanning" to 1.
Q. I used Wake-On-LAN function to power on my PCs. Sometimes it worked fine
but sometimes it failed. Why?
A. A computer may not be powered on by using Wake-On-LAN, if it was shut down improperly, or the Windows 2000/XP/2003
system hibernated. For some network cards
require a flag to be set, which only happens when the operating system power down
the computer normally.
A computer probably failed to be waked up after a power loss when AC power was
restored. If you wish the computer to power on automatically on AC power back,
you should configure the BIOS setup. Just enter BIOS Setup, then enter Power
Management Setup, set the value of "AC Back Function" to "Full-On", then save
and exit BIOS Setup.
Q. After shutting down a Windows 2000 computer by using Remote Shutdown, I
used Wake-On-LAN and expected to boot it but failed. Why?
A. While a Windows NT/2000 computer is shut down by using Remote Shutdown, it simply shuts down
the system and doesn't power down the computer, so you cannot power it on again by using
Q. I already have a list of computer names and their MAC
addresses. How can I use this list in Wake-On-LAN?
A. (1) In version 1.40 or higher, use Import function to import your
data into the program.
(2) In early version, run the Notepad.exe application or any other plain text editor, input the existing
MAC address, IP broadcast address and computer name just as the following format:
FF-07-E9-0F-20-12; 255.255.255.255; PC1
FF-05-5D-FB-90-DB; 192.168.1.255; PC2
Use semicolon as the delimiter in each line. IP broadcast address and computer
name are optional. If IP broadcast address is omitted,
255.255.255.255 would be specified by default.
After input completed, save them to a text file (.txt). Click Load button in
Wake-On-LAN dialog, and then open the file that you saved just now. All the targets would
then be loaded into Wake-On-LAN dialog.
Q. How to use the computer data in Microsoft
A. (1) Excel2002: Open your XML file created by LanHelper in the "File>Open"
dialog box in Excel. In Import XML dialog box, select "Open the file with the
following stylesheet applied" (The only stylesheet it has is pre-selected for
you), and click OK button.
(2) Excel2000: Import your data to a CSV file in LanHelper, and then open it in Excel2000.
(3) Word2000/2002: Open your XML file saved by LanHelper in IE or other web
browser, click "Edit>Select All" from the menu bar, and then click "Edit>Copy".
Run the Word 2000/2002 program and click "Edit>Paste" from the menu bar.
Q. Which ports are used by LanHelper?
A. From version 1.30 on, LanHelper opens TCP port 9812 and
listen on it. This port is used by LanHelper Integrated Command feature. In Wake-On-LAN command, the source UDP port is port 9810 and the
destination UDP port is port 2304. The other ports may be used by the program
are standard Windows system ports, 137, 139, 445. For example, UDP port 137
is used by Refresh Status. Destination TCP port 139 is used by Remote Shutdown
and Abort Remote Shutdown. Destination TCP port 445 is used by Remote Execute.
UDP port 137 is used by Send Message.
Q. How to manually unlock the mouse and/or keyboard if they were locked by
A. Just press Ctrl + Alt + Shift + U keys If the keyboard was locked. If only
mouse was locked, press Ctrl + Shift + Esc keys to make the Windows Task Manager
visible, then use your keyboard (Tab, up arrow, down arrow, Alt + E) to
terminate the msspr.exe process. You may fail to terminate this process if you
haven't enough permissions. Then another simple way is restarting the