i'm using windows xp prosesional edition.
sometimes my pc hang, and blue sreen with error message appear :-

1. BAD_POOL_CALLER
2.IRQL_LESS_OR_EQUAL
3.DRIVER_IRQL_LESS_EQUAL
4.it also said .... dumping physical memory to disk

what is all the error?
i've formated my harddisk but i happened again.
i've test all my hardware like RAM,HARDDISK,PROSESSOR,and MAINBOARD but it okey.
I hope somebody can help me with this problem

Did you Google before posting.

Lots of information IF you search for it.
You did not include the numbers after the error. they can be usefull.

Read through the considerable information on the subject and THEN post a guestion.

http://www.microsoft.com/resources/documentation/Windows/XP/all/reskit/en-us/Default.asp?url=/resources/documentation/Windows/XP/all/reskit/en-us/prmd_stp_czgw.asp
http://support.microsoft.com/default.aspx?scid=kb;EN-US;314492
http://support.microsoft.com/?kbid=310527
http://support.microsoft.com/?kbid=309155
http://brandon.fuller.name/archives/2003/06/27/00.32.14/
http://www.techspot.com/vb/showthread/t-14814.html
http://www.techspot.com/vb/showthread/t-15346.html
http://www.wilderssecurity.com/showthread.php?t=49397