XP BSOD

[RonK]

I installed XP Home on a new build and occasionally the BSOD pops up with
this error message:

vsapint.sys page_fault_in_nonpaged_area

I have Outlook firewall, Popup Ad Filter and PCCillan antivirus installed.
No other programs yet. SP1A has been installed and XP has been activated.

Any suggestions ?
Thanks
Ron