pbbaltay

Hello, Our HP Pavillion ze 4800 laptop (XP Home, AMD processor) will not start up, even in Safe mode. Upon startup we get an winlogon.exe application error message that instruction at 0x77f56cde referenced memory at 0x002e5b54, which cannot be read. The machine goes into a continuous re-boot loop. I've reinstalled Windows XP home, to no avail. I've tried removing one of the two RAM chips, and switching their poitions, to no avail. How can I get the machine started, just enough to save the hard drive contens? Will I need to completely reformat the drive? Any help would be greatly appreciated. -peter