>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.


You might also look to ensure your power management settings haven't somehow change, which could cause the HD to power down.