[Qtx]

Personally I agree with Tizme, although CCcleaner can help some, I never fully trust any of these apps.

Cleaning out your temp folders, browser cache (and various databases), deleting and re-making swap file and possibly defragging usually are enough to speed things up for a start. Usually suggest more RAM but you have plenty.

For temp folders, type this into the run bar: %temp%

Order the files/folders by date and select everything except files with todays date, as they could be locked and cause the deleting to fail.

Browser cache is dependent of your browser but its worth deleting everything if you can (in chrome make sure you choose the Forever option) although don't delete cookies if you can't remember your website logins.

Deleting and recreating the swap file can be done by turning it off, rebooting and turning it back on again. Personally I like to set it to a small size before disabling it and then making it back to near its original value after the reboot. Right click My computer>Properties>Advanced System Settings>Advanced Tab (performance)>Settings>Advanced>Virtual Memory>Change