Not nearly enough information, for anyone to help with tweaks...
But if he/she means "slower than in the past", the first step would be to run a virus scan and an adware/spyware scan.
I don't mean to spam for another forum, but FreedomList has some excellent spyware experts who can help if you have trouble getting rid of something.
See: http://www.freedomlist.com/forum/viewtopic.php?t=17328
Start a new topic, and see if you can get "Corrine" or some of the other experts to help. (You'll need to register to post).