"Blue Screen" page_fault_in_non-paged_area"

but not necessarily.

"Requested data was not in memory. An invalid system memory address was referenced. Defective memory (including main memory, L2 RAM cache, video RAM) or incompatible software (including remote control and antivirus software) might cause this Stop message, as may other hardware problems (e.g., incorrect SCSI termination or a flawed PCI card)."

That from http://aumha.org/a/stop.htm and find the link to - 50 - in the left hand column.

Do you only use SuperAnti-spyware? Do you have a firewall and anti-virus as well? If so, which ones?

Mark

it is most likely a RAM issue..Please run the hardware diagnostic tool from the BIOS if it presents there.

It could be the old issue where the PC needs cleaning. We are talking a XP machine.

Here's a starter for you on that -> http://reviews.cnet.com/4520-11319_7-6240575-1.html
Bob

Probably some of the softwares are using constantly the same process so ram memory is over capacity. Try to add more ram or unninstall some of the softwares you have installed recently.

There are number of reasons for Blue screen appear.Sometimes hardware driver installed into your system requires updates.So they try to check update online.Therefor system may start slow or stop suddenly.There may be possibility that virus attacked on your system.So, It don't allow you to access access the system and therefor system become hang and blue screen appears or may be your hardware damaged.