hi all, and thanks for this forum :grinthumb . I m having the weirdest problem: my laptop gives me BSOD when it runs on battery power. When I plug it in to the power outlet, everything is fine. Last BSOD message was: PFN LIST CORRUPT, but I also had IRQL NOT lESS EQUAL before.. I tried running on different memory stick configurations, but still get BSODs while running on batteries (again, everything is fine when laptop is plugged on the wall..). I m lost. why would the computer do BSOD only when it runs on batteries??? The machine is an intel centrino 1.3ghz with 1.25gb of ram, runs on xp pro. should I post my minidump or is there some steps I could take first? thanks for the help!