To ITstudent2006,
I think it has a virus because there are some pop ups that appear on my screen that your computer is infected and etc. Also, sometimes it appears that your computer is infected with trojan something like that and i have been told that thats a virus but im not so good with computers.
That's most likely NOT a virus, but moreso spyware / malware and any type of antivirus software ISN'T going to remove that. You get those types of pop ups based on the type of websites you visit in some cases, and in others, they come from if you've ever been to a site and clicked on an advertisement attached to that site for another site or product. Download, install and update Malwarebytes and Spybot S&D. Check out the two following links on how to set them up correctly, scan and remove any and all instances found. Your best bet is to scan the computer in SAFE MODE WITH NETWORKING since the majority of your infections become inert when the computer is in safe mode but can still be removed without harm to the system. It will also help the scan to go faster as it doesn't have a lot of associated processes that are running to dig and scan through.
Using Spybot - Helljack6.com (http://www.helljack6.com/spybot.html)
Using Malwarebytes - Helljack6.com (http://www.helljack6.com/bytes.html)