Win Boot Mgr Error 0xc00000e9: Unexpected I/O error
My father's computer refuses to start. It's running Win7 Pro x64. When I attempt to start it up, it starts up the Windows Error Recovery program, suggesting that I launch Startup Repair, and allowing me to start Windows normally. In both scenarios, I get the same error. When I start normally, I get the Starting Windows text, then I get a solid white bar with Windows is loading files... above it. It fills up halfway, then I get Windows Boot Manager error 0xc00000e9: An unexpected I/o Error has occurred.
This computer is a stock Dell Inspiron 530s, with no new hardware devices added or removed in recent memory (other than starting from a USB stick once or twice, but not since I installed Win7 Pro x64 on here).
How should I proceed? Should I plug in a USB stick I have Xubuntu 9.04 on and backup all his files before I do anything?