false positive with microsoft print driver unidrv.dll ??

Hi I just got a false positive with avast, current antivirus definitions, on a unidrv.dll file listed as being published by microsoft. I scanned this file with malwarebytes and no problems. I have submitted this file to avast, I am assuming this is a false positive…

Also, this kills the printer. You have to restore the file out of the virus chest, exclude the file,
for me “C:\WINDOWS\system32\spool\drivers\w32x86\3\unidrv.dll”, and then stop and start the print spooler service to resume printing…

-Jerry

http://forum.avast.com/index.php?topic=76220.0