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#11
If System Restore and Disk CHeck from the Repair CD Command Line don't work, try SFC -SCANNOW Run in Command Prompt at Boot also from the CD Command Line.
If this fails, you can try Startup Repair a few times from the CD. Report back anything it finds.
Because of the prompt to chdksk I would test the HD using the maker's extended diag/repair CD scan: HD Diagnostic
You can copy out your files using the CD: Copy & Paste - in Windows Recovery Console or using Vista.
Then find a Win7 retail installer to clean reinstall following these tips to get a perfect reinstall: Reinstalling Windows 7
TuneUp Utilities causes a lot of problems with Win7, which needs absolutely no tweaking beyond normal system settings - it will almost always mess up your system.