what can i download to detect and remove viruses?

[Ed G]

The first thing you need to do is run a scan with your anti-virus software. It would also be a good idea to get malwarebytes anti-malware which is a very good program that is free. You can find it at download.com Hopefully between the two they will take care of your problem. If you don't have a anti-virus program, there are some free ones that are good. Avira, Avast, and Microsoft also has one that's not bad. Most of the anti-virus program offer good level of protection, even the free ones. I in fact there are only a couple I tell users to stay away from. Trend Mirco which is recommend by one of your answer is a very bad choice, Its scores very low in the big independent testing labs. These labs are well respected and the results are not disputed by the anti-virus companies.If need I can supply you with links proving what I say. I won't try and pass by self off as a PC Tech LOL who then recommends weak security software.