When a Windows program doesn’t behave, many of us uninstall and reinstall the application — which doesn’t always work. The How-To Geek explains the different ways of erasing Windows program settings.
Photo by Jason Eppink.
We've recommend Revo Uninstaller before and that's your best and safest bet for removing preferences and settings. If that still doesn't fix your problem, you might have to go into the registry and delete some information manually:
You can open the Registry Editor by pressing Windows Key + R, typing regedit in the Run dialog, and pressing Enter. You'll generally find a program's settings under HKEY_CURRENT_USERSoftware or HKEY_LOCAL_MACHINESoftware. Delete a program's settings by locating its key (folder), right-clicking it, and deleting it.
Be very careful when doing this -- delete the wrong registry key and your Windows system may become seriously damaged
We always recommend backing up your computer before you change any settings or delete information. Check out the full post below for more details.
How to Reset a Windows Program to Its Default Settings [How-To Geek]