Reset Windows Registry and Service to Its Default State

RefreshPC is an easy to use, freeware utility that can help you reset your computer’s registry settings and all services to their default state. It is quite useful to fix the issues caused by wrong registry settings or service settings. For example, you can use it, when you have changed something in Windows registry or services that caused problems to your PC, and find that you can't fix it anymore.

RefreshPC can do the following things with a single click:

1. Reset key registry entries back to their default values.
2. System services to their default state
3. Clean temporary folders and prefetch files.

RefreshPC works on Windows XP, Windows Vista, and Windows 7(64bit and 32bit versions). You can download it free at source here. (via)