I uninstalled NIS (I forgot the version) and now Windows Vista won't boot.

I uninstalled NIS (I forgot the version) and now Windows Vista won't boot in normal, Safe Mode, or Last Known Successful Boot.

It has the Microsoft loading bar, and the hard disk light blinks at normal interval. (In Safe Mode, it gets stuck loading files and the light blinks.)

The Microsoft loading bar disappears in a minute and the light keeps blinking.

Windows Vista Business