Error message win23k.sys

I hope someone can help me..for some time now I have had minor problems with my computer. I had asked for help in a different forum about it..and now it seems I know how to fix it..but not it still comes back..I have to restore quite often to get my computer up and running correctly..

the error I am getting is:

win32k.sys

page fault_in_nonpaged_area

stop: 0x00000050 (0xBC60B000, 0x00000001, 0xBF800DA4, 0x0000000)

win32k.sys

address BJ800DA4 base at BF800000, Datestamp 3f73195d.

Can anyone tell me what all this means..was hoping if I fixed this problem my days of restoring might be over..well at least as much as I have to do it now..

thank you in advance on your help..

Dee

Dimension 8300, Pentium 4 Processor at 2.8 GHz
512MB
17" Flat Panel Display
80GB Hard Drive
Windows XP Home
48x CD-RW/DVD Combination Drive
250MB Zip Drive
Sound Blaster Audigy 2
128MB ATI Radeon 9800