Stop: 0xA Error after power failure

My system has been working fine with no problem for 3 months. Then one day I was downloading a large file from internet, when there was a short power failure. Upon restart, Windows loads and instantly gets a blue screen error. A STOP: 0xA error from IRQL_NOT_LESS_OR_EQUAL. When i try to restart i get the same error, even in safe mode.

I heve tryed the application "DocMemory RAM" to test my RAM and it passed. I have tryed to use the WinXP disc to recover and after i still get same error. I have read that the 4th pram in the error is the location, how do i tell where that is? How may i resolve this?

-------blue screen error-------
IRQL_NOT_LESS_OR_EQUAL
***STOP: 0x0000000A (0x00000018,0x00000002,0x00000000,0x804EA528)
***  PartMgr.sys-Address F87C580A base at F87C5000, DateStamp 3b7dc5a7
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once i got an error that says:
<windows root>\system32\hal.dll corrupt

----system-----
Mother: abit IT7-MAX2
CPU:    Intel P4 2.4
RAM:    512mb DDR pc2100
gfx:    Albatron GeForce4 ti4600
hd:     Maxtor 120gb ata133 (one partition(winXP))
modem:  56k
and some cd drives
all drivers update
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Please help, Thank you for your thoughts...