Next, you need an anti-virus program. This stops malicious programs being installed on your computer by, for example, email attachments. Nothing in your post suggests that you've got
any antivirus program at the moment. Get hold of AVG Free Edition or Avast! Home Edition (also free) as soon as possible.
Lastly, you need an anti-spyware program. This gets rid of software which tracks your web activities, so that you can be targetted for advertising purposes. These types of software have a nasty habit of slowing your PC down or of causing conflicts with legitimate software. Spy Sweeper is an anti-spyware program. (It is
not an anti-virus program). It will do the job but it's no better than the free stuff, such as Adaware or SpyBot Search & Destroy (so there's little point in paying for the Spy Sweeper subscription).
All the links that you'll need are in my post here:
http://www.theanswerbank.co.uk/Technology/Ques tion669796.html
Chris