There are those here that don't like system restore for various reasons. The size of the file can grow to a huge size, and then there are those times that you really could use it and it doesn't work. But there are times which it is appropriate, and when it works can save you a lot of headaches. This is one of those times that I would also suggest using it.
Something else which should be taken into consideration is the fact that if you make a mistake in editing the registry you can turn your computer into a door stop. If you aren't familiar with editing the registry I would suggest backing it up first with a program like Erunt
[*]For version with the Installer:
Use the setup program to install ERUNT on your computer
[*]For the zipped version:
Unzip all the files into a folder of your choice.
[/list]Click Erunt.exe to backup your registry to the folder of your choice.
Note: to restore your registry, go to the folder and start ERUNT.exe