Hello, It may be a silly question, I just was wondering how do they get rid of a virus in the computers they clean, I know I use an antivirus program and scan my Pc, and if it finds something, the program will tell me what I wan to do with it, of course I choose delete. Is this the same process a computer repair shop uses?

i was just online one day and turned off my computer and the next time i logged on to my user it says "you may be a victim of software counterfitting". I have no idea what this means, is there anyway i can make the message go without spending any money or going to a computer repair shop? I tried clicking on resolve now but it went to windows . com and said i had to buy something for £100 🙁

As i have many just now repurchased Trend Micro Pro and at the same time bought a computer from a local computer repair shop becuase it had windows xp x64 on it i thought it was well worth it since so many problems vista has, but any one have any idea what antivirus software will work, everytime i try to install my software or different versions of it to see wich work i keep on getting a message to read my installation documentation and what i am installing is a 64bit installer file
anything else that might work,