For future reference, here's how you can use the registry editor to reset your profile path. This works if Windows created you a new profile because your old profile was locked up for some reason, not if your old profile was actually corrupted.

Start REGEDIT while logged on your administrator account (don't use "Run as" from your regular account) and look at the key,

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

Each key under ProfileList corresponds to one of the internal system security IDs (SIDs) that Windows assigns to accounts. The short ones are internal Windows functions; the long ones are actual users. (The long one ending in -500, for instance, is the default administrator account.)

Under each SID key is the string value ProfileImagePath, which gives the actual disk path to your profile folder (files, desktop, shortcuts, personal documents, and so on). Skip through the SID keys until you find one with ProfileImagePath pointing at your newly-created profile, and carefully change the path to point back to your original profile. (Don't change the "%systemroot%" string to "C:".)

If your old profile wasn't actually corrupted, it should come up normally the next time you log on your regular account.