It's been my experience that if you're relatively non internet savvy and don't have someone who knows what they're doing around you, chances are your computer is crawling with Spyware.
Symptoms of Spyware can but not necessarily include, really odd and random homepages, stupid tool bars on IE that you can't seem to get rid of, your computer running ridiculously slowly for no apparent reason.
I am here to help. But for me to help you, you have to do a wee bit of work first
First run Spybot. Don't have it? Get it here
And clean up yo stuff with that. If you have problems after that, then its time for the manual seach and destroy!
You'll need Hijack This!
Then you'll need to run that and get the log. Copy that and paste it here. I will then go through and make sure you don't have crap on your computer. If you do, I will help you remove it. If you aren't sure. Run it by me anyways.
This is a free service brought to you by Campbell Inc.

PS
There's a plethora of ways to contact me. Feel free if you have any issues.