When I close a window I receive-- "The instruction at "0X7c911389" referenced memory at 0X00000010". The memory could not be "read" Click OK to terminate the program.
What does this mean??
Window XP

Which application gives this error and how often ?

Which application gives this error and how often ?

Just about any and several times a day like I exited out of NASCAR.com and received yesterday it was eBay and ask me help desk.

When did you last do any serious maintenance including full patching, scanning, defraging and generally clearing out...

When did you last do any serious maintenance including full patching, scanning, defraging and generally clearing out...

I auto update on Microsoft. I use windows Defender and Windows security essential virus scan weekly and every other week I scan and delete files and history. I defragment once a month.