memory could not be "written"

[rekawt]

please i need help from you again same time again i get this message error [[ explorer.EXE- application error

X

the instruction "0x02827fc4" referenced memory at "0x00000000". the memory could not be "written".


Click on OK to terminate the program
Click on cancel to debug the program


OK CANCEL

[NHH]

Details?

What operating system are you using?
When does the error happen?
Since when has it happened?
etc. etc....

I'm not psychic u know.

[t]

i use Microsoft windows xp professional version 2002
amd sempron(tm) processor 3100+ 1.8 Hz 480 mb of ram

relay it does happen many time i can't remember what is gowning on but i get this message it not very clear what i did and then i seen this please you may know my problems thanks