To help us help you, please make sure you provide the following information when asking a technical question about your PC:
Operating System: e.g. Windows XP or Windows Vista
Anti Virus Software : e.g. AVG Free, Norton
Anti Spyware Software : e.g. AdAware, Microsoft Defender
How do you connect to the net : e.g. ADSL (router?), 56k Modem
Your Computer Specifications - This is very important!!
If you are unsure of your system specifications you can download SIW here which is a free tool that can give you all of the information you need to know. If you aren't familiar with your system, things to mention from SIW are : Motherboard vendor and model (motherboard tab), physical memory (system info tab), CPU name (CPU info tab), Video Processor (video tab).
If you think you have a virus/spyware on your system that you can't remove using the normal tools then please be sure to attach a HJT log from here. This will help us diagnose applications that run at startup.