How to get rid of "Windows Security Alert Virus"?

i snuck onto my laptop and found myself looking at websites i shouldnt have and now i have a virus that says you have a security problem and it wont go away. My dad told me about this virrus and then installed firefox to prevent it from happening. How do i get rid of it so i wont get busted for 1) sneaking on and... show more i snuck onto my laptop and found myself looking at websites i shouldnt have and now i have a virus that says you have a security problem and it wont go away. My dad told me about this virrus and then installed firefox to prevent it from happening. How do i get rid of it so i wont get busted for 1) sneaking on and 2) putting a virus on mylaptop. my fathers good with computers and could prob remove it but i cant go to him b/c ill be screwed. PLZZZ some 1 help im about to have a heartattck. the virus also changed my backround and it looks like a giant virus symbol and says the following:: "Your Privacy is in danger" "download privacy protection software now!" then theres a pop up screen that wont go away and says "windows has detected a viruss somebody's trying to blah blah blah" my comp keeps telling me theres a virus. i just ran symantec antivirus but it hasnt found anything yet. i keep on getting redirected to antivirus sites but it think there apart of the virus. please help!
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