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NT On-Access Scanner error

I just put a notebook with XP Media on a Windows 2003 small business server.

I keep getting hung up...then I get this error

NT On-Access Scanner Service error....program must close.

Any ideas?
1 Solution
 Click Start->Run->MSCONFIG

  In the Startup tab, start out by disabling everything you're unfamiliar with (or everything if you're unsure).
  Optionally, you can also disable non-Microsoft services from the Services tab.
  If the problem no longer exists after a reboot, then you can narrow it down as one of the items in your
  startup (unless you specifically find this Scanner service)...

  To permanently remove these item(s), proceed as follows...

  Click Start->Run->Regedit
  *Be careful when editing the registry as an accidental deletion can render your system inoperable.
  First navigate to the following key in the registry:
   *You might also find RunOnce, RunOnceEx, RunServices, RunServiceOnce or any of these with a trailing dash (-)

  Once found, click File, Export to save a copy of the key before you delete any items (if necessary).
  After the file has been saved, delete items as needed from the right pane.
  Now find the next startup key:
   *You might also find RunOnce, RunServices, RunServiceOnce or any of these with a trailing dash (-)
  Follow the previous procedures to export a copy before deleting items from the right pane.
1. Start Windows XP in safe mode.
2. Disable the service "NT On-Access Scanner Service"
3. Reboot
4. Uninstall you antivirus software
5. Reboot

This must solve your problem.

Use other antivirus software. For example Symantec is a great choice for Windows NT based operation systems like Windows XP.


Berdt van der Lingen
It could also be that the service is running with an account of a user, and not the local system account, and that users password has changed or expired, therefore the service wont run on startup.
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thank u
very much
it worked
I I'm haveing the same problem on my laptop, running windows xp, with mcafee.

Coming is running normally then it will just chug, and I get NT On-Access Scanner Service error message pop up, so i disable my virus scannning software (mcafee) and everything speeds up again.

Is this problem something to do with the Virus scanning software or Windows itself?


WinXP with McAfee AV, just got this NT On-Access Scanner Service "encountered a problem" error on a client's computer.  On boot very sluggish until this error appears, then OK.

Control Panel Add/Remove, Removed McAfee AV, left the McAfee Firewall, no more error.  Didn't have to do the Safe Mode Services Removal.  Client had Norton AV installed as well, using that for the AV.
tvaccAuthor Commented:
That is how we solved it....we just used Symantec Corporate Edition.

We understand that Mcafee now has a Corporate Edition...but we have not tried it yet...

I had the same problem on a dell desktop, uninstalled the Anti-Virus part of the Mcaffee Suite and all works well now.
McAfee suggest this as the fix:

"Click on the Start-->Run.
- Type the command as "services.msc" (without quotes)
- Locate the services of the "McAfee.com McShield".
- First stop the Service and then again start the service and after that please double-click on the "McAfee.com McShield" service and change the status as Automatic under the "StartUp Types" and then click on the 'Recovery Tab' there and choose "Restart the Service" from the 'First Failure' box and click on OK.
- Close the computer management window."

Same Problem with Client running NAV 2002 and freebie McAfee courtesy of AO*@#$%^&L

WinXP with McAfee AV, just got this NT On-Access Scanner Service "encountered a problem" error on a client's computer.  On boot very sluggish until this error appears, then OK.

performed the above procedure and seems to have corrected the issue
So I lied,,,,,, problem returned as soon as Norton tried to initilalize

Fully Removed Norton and McShield.exe is running fine

On another note
It seems that some virus checkers (e.g. McAfee), disable the Microsoft script engine.

If application will not run after installation, or if it has stopped working after installing McAfee, you can fix the problem by downloading and re-installing the Microsoft script engine from one of the following sites:

For Windows 2000 and XP...
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