pc getting slow

With no info about your PC or OS there could be a multitude of reasons for your problem. You mention cleaning viruses - were there viruses? If yes, perhaps some key files were damaged and an OS re-install might be helpful and be sure to update the security packs and various updates and use the most up-to-date drivers.

If no viruses were found, have a look in Device Manager to be sure there are no conflicts or poorly installed or errant drivers and so on. Any red or yellow warning marks in the Device Manager list would indicate a matter requiring attention.

If Device Manager shows no problems, check what applications are loading up at Start-up time. Remove any programs that you or the computer have no use for. If your software is pre-installed, there will usually be a tonne of unused and unwanted programs being loaded up and wasting computer resources - I would be ruthless about those.

Sometimes simply upgrading the RAM memory to the computers maximum spec will do wonders.

Once all the above have been paid attention then performance optimisation settings might be helpful but then more PC an OS details would be helpful. Good luck!

Another culprit that slows computers down is Spyware.

Download Ad-Aware 6.0 and SpyBot Search & Destroy. Scan your computer and remove all entries of spyware.

Then download SpywareBlaster. This protects your computer from getting known spyware at all.

With so much information about the system and its symptoms I can only suggest that you get a very good Political Correctness manual and read it, that should speed up your PC capabilities.(;-o)