Do a REPAIR INSTALL
, which will save your programs and data just requires reloading Windows updates. If your disk doesn't work because it is pre-SP1, download a legit Win 7 trial image of the same version from DIGITAL RIVER
and use your key to re-activate. You cannot do a repair install with an older install disk to a version updated to SP1, either need the new disk or uninstall SP1 -- and that is hard to do when the system is unstable.