Do you have SMS client or some form of SMS service installed?

If so, get rid of it unless you network administrator has it there for a reason.

http://support.microsoft.com/kb/314141



>I got the error again right now.
>
>Here is the Application error:
>
>Event filter with query "SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA "Win32_Processor" AND TargetInstance.LoadPercentage > 99" could not be reactivated in namespace "//./root/CIMV2" because of error 0x80041003. Events cannot be delivered through this filter until the problem is corrected.
>
>and then
>
>The following boot-start or system-start driver(s) failed to load:
>SASDIFSV
>SASKUTIL
>
>
>
>>>Hi everybody,
>>>
>>>Starting recently I'm experiencing Vista lock ups after some period of activity. Both keyboard and mouse stop responding and I have to re-boot.
>>>
>>>I switched to Microsoft Essentials antivirus over AVG and it found and removed few viruses (why they were undetected by AVG?)
>>>
>>>Anyway, does anyone else experience the same problem and what can I do to troubleshoot?
>>>
>>>Thanks in advance.
>>>
>>>--------------------
>>>One more thing - after each such re-boot all my IE sites lose their settings and I have to type my passwords again.
>>
>>First, check your event logs - especially System and Application, for errors or warnings.