you probably have about 3000 cookies or temp internet files, and all that £20 will do is delete them, which is easy enough to do in your browser.
I agree. If there really were 3000 speed issues, then i reckon you’d notice windows being slow…
Download CCleaner (the free one is fine) and let it run through it’s “Cleaner” and “Registry” processes, and you’ll be ‘reet.
A defrag won’t hurt, either. If you don’t run them regularly, then it’ll take hours. The best bet is to set the machine up to run a defrag regularly. My machine boots up every wednesday at 0100, runs a defrag, and shuts down again.