If the subject STOP conditions occassionally happen, but you can still boot, try the following:
1. Schedule a CHKDSK < PageFile Drive: > /F /R for the next reboot.
2. After the CHKDSK finishes,
use Control Panel / System / Performance / Change
to set the Initial and Maximun size to 0.
Click OK and YES.
3. After the restart, reset the Pagefile Initial and Maximum size to at least RAM +12.
If the above does not work for you, see tip 0526.