HELP!!!!!!!!!!!!!!!!!!!!!!!!.... BEFORE I THROW MY COMPUTER OUT THE WINDOW

OK SO WHERE THE HECK ARE MY POSTS THIS WEEK?????????????????????? WELL....Mr. Home Computer has decided that it is infected and i need to get a antivirus something and clean it. BUT IT HAS AN ANTIVIRUS THING ALREADY ON THE COMPUTER...............

HELP ME!!!!!!!!!!!!!!!!

I AM NOT SMART IN THE AREA OF COMPUTERS........(note to self....marry someone that is) HA!

I can still get online and stuff but nothing connects and I need you all out there.... that know what to do to TELL ME!!!!!!!!!!!!!!!!!!! PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Do i need to buy something...do i need to delete something...........

FAST

FAST......I can't stand sitting in front of the stupid thing for 2...yes count them 1,2..... NIGHTS IN A ROW TRYING TO
"SCAN IT'.... UUUUUUUUUUUUGGGGGGGGHHHHHHHHHH

SO PLEASE HELP ME!!!!!!!!!!!!!!!!