when i go online my homepage is not the one i put there. i change my home page to the website i want but when i boot up the pc it goes back to a other webpage i dont know.and when i am not online not even connet it this home page just start up from no were like every 5 minutes.is this some kind of virus of something becuase none of the antivirus cant detected.what can i do to fix this problemSounds like your homepage has been hijacked.  You should post in the Viruses & Spyware forum.

Run AdAware, Spybot S&D, CWShredder all free DOWNLOADS but update them before running.

Good info here http://www.computing.net/security/wwwboard/forum/13691.html

When you post please don't forget to advise your Operating System, Anti-Virus SOFTWARE name, Firewall name  & are you running SpywareBlaster/Browser HIJACK Blaster.  And what the heck is the name of your unwanted homepage - some have their specialised removal programs.joel......If you have a hijacker here's what to do .....Go to ......  http://www.majorgeeks.com/download3155.html
and D/l hijackthis 1.99.1   .....then scan your pc and post the logfile it generates here for us to examine . Then we can probably assist you .

let us know

dl65  dl65 - Agree with you on HJT but would it not be BETTER for the OP to delete some, if not all, the junk he possibly has before posting a HJT logfile for assistance?