HELP...Virus in my computer....?

I am stuck with a malware called Personal Shield Pro.I have downloaded a lot of antivirus,but this virus keeps blocking them and not letting me open anyone of them.PLEASE,YOU GUYS,I BEG YOU SO MUCH,help me remove this threat of my computer.HELP ME TO GET RID OF THIS JERK THING.I HATE SO MUCH THI.Please,guys,I beg you,help me.What do I do?Don't say/write here ''Search on Google'',because if I had already found out how to do it,I wouldn't be here asking to you.Please,help me.