Do you remember when you first got your computer, how fast it was! It was great! But little by little it got slower and slower and you don't know why!
There are several reasons why your computer can be slow. Especially when it happens suddenly, then it can be slow because of malware (spyware, adware, trojans, viruses..). However, it's not always malware causing this. A computer that suddenly becomes slow may have a virus or spyware program robbing its resources. You should run a virus scan and spyware sweep as a first step in diagnosing a suddenly slow computer.
PCslow Doctor will give you a good start at diagnosing and correcting issues that slow your computer down.

• PCslow Doctor 2.0
  Do you remember when you first got your computer, how fast it was! It was great! But little by little it got slower and slower and you don't know why! There are several reasons...

• WiseFixer 5.991
  Wisefixer will Fix Errors, Speed Up, And Optimize Your PC Beyond Brand New

• PAL Spyware Remover c
  PAL SPYWARE REMOVER Download and Scan your PC Today FREE - DETECT, REPAIR and ELIMINATE Spyware and Adware that is Infecting your PC. It is very likely your computer is infected with Spyware that normal Antivirus programs cannot detect. SpyWare...

• WiseSurfer Elite Diagnostic Tool 1.0
  With WiseSurfer's Elite Diagnostic Utility you will be able to diagnose and fix problems with your PC such as slow bootups, pop up ads, and error messages