In the following IT Dojo video, I go over the three things you need to do before reinstalling Windows to make the process go smoothly.

Original blog post:

http://www.techrepublic.com/blog/itdojo/?p=203

There are many reasons you might need to reinstall Windows. Perhaps the registry has been corrupted, the machine is experiencing performance issues, or you can’t remove a particularly stubborn bit of malware. Whatever the reason, sometimes starting over with a clean install is the best option.