My system won't boot, even in safe mode. The message I get is "an invalid parameter was passed to a service or function." The system error is in lsass.exe. I am going to try to get an xp boot disc from someone, but what can I do once I have that? I am using my laptop to access this forum, so any fixes I need to download would need to be installed from a disk (I have a flash drive I could use). Please help!