prijava v win XP

ko hočem v win xp, se mi ob welcome screenu pojavi to okence:
SAS window :winlogon.exe -application error
the instructions at "0x70a78b05" referenced memory at "0x70a8e068". The requred data was not placed inro memory because of an I/0 error status of "0xc000009c"
potem pa lahko samo se terminate program (->restarta comp) ali pa debug (->nov popup, tokrat je error msdev.exe in ta se ponavlja)
what to do?

to sem že probal (f5- previously save conf or sth like that) pa se vedn ne dela... a je možno da je težava strojna (k pride do welcome screena začne disk take čudne zvoke delat k da ne zna prebrat)?