@gicio There may be some registery "hacks" that will appear to make some systems faster although it may be better if we knew the specs of the machine you have.
The above post should be read very carefully and completely and not to take a quick look for a "fix". If you are having problems with certain areas then that should be addressed first.
The site below will have lots of information as too what services can safely be disabled or not depending on the use of the machine
/http://blackviper.com or do a google search for Blackviper
Welcome to BetaOne.
Thanks
Dudelive
ps: Before you even think about tweaking the registery be sure to have a backup.
It is real easy for it to get in worse shape than before you started.