McAfee is aware of a w32/wecorl.a false positive with the 5958 DAT file. McAfee has developed a SuperDAT remediation Tool to restore the svchost.exe file on affected systems.
What does the SuperDAT Remediation Tool Do?
The tool suppresses the driver causing the false positive by applying an Extra.dat file in c:\program files\commonfiles\mcafee\engine folder. It then restores the svchost.exe by looking first in %SYSTEM_DIR%\dllcache\svchost.exe. If not present, it attempts a restore from the following:
After the tool has been run, restart your computer.
For details and remediation steps, see: KB68780
The issue is resolved in the 5959 DAT file, which is available from the McAfee Security Updates page at: http://www.mcafee.com/apps/downloads/security_updates/dat.asp?region=us&segment= enterprise
Information updates will be given through our Support Notification Service (SNS). To sign up for SNS, go to: http://my.mcafee.com/content/SNS_Subscription_Center.
Thanks. I've been working in IT for over 20 years. They obviously failed to properly QA that update, before releasing it to the public. There's no way it could have simply been a coincidence, with that level of severe impact on so many companies / computers.