When you used the calibrator, did the software save an .icm file? It should have done. That's what the profile loader should be using. The profile loader shortcut should be in somewhere like
C:\Documents and Settings\All Users\Start Menu\Programs\Startup
You should be able to see it in the Startup tab if you Start>Run>msconfig
If the calibration software hasn't installed a profile loader, you can use Adobe Gamma:
Make sure that it is selected in the msconfig Startup tab, that should make a shortcut appear in C:\Documents and Settings\All Users\Start Menu\Programs\Startup
Then open Adobe Gamma from the Control Panel, and hit the Load button. Then select the .icm profile the calibration software made.
Restart Windows.
Remember that when the calibrator is working, any monitor profile that was active needs to be disabled, otherwise the calibrator isn't making a profile for the monitor, but for the profiled monitor. Disabling the profile will make the screen look different.
Best,
Helen