I agree with the others about Iobit. They've been caught, more then once, stealing other companies code. Just recently they took their 'Toolbox' util off their site, and I'm hearing it's because they got caught stealing reg cleaning code from another company. Not a company you wanna trust...
Blackviper is an excellent site. Been using it for years. You can select your o/s pick which services you want disabled, etc, etc, and then the site will create a batch file to do the implementation, and another to restore the system to it's defaults. Simple.
If you want to try a game booster util, then try Jetboost. You can also do a search and find a few other game boost utils that are freely available.
Jetboost:
http://www.bluesprig.com/jetboost.htmlWabb