someone is definately in your computer...is a fresh install an option for you? what antivirus program did you install? a little info on what kind of computer you have would help...the make...cpu speed...memory...operating system...if you like try downloading a program called hijack this and pming me with the results...a word of warning though DO NOT try fixing anything this program finds or you could kill your computer...I will take a look and let you know what is bad and what isn't...there is a thing called phishing sites on the net now that canlook just like a favorite website you use...and yes even banking sites are being used...if you do use the internet for any banking look at the address bar and make sure the site is HTTPS///...if it is just HTTP///...then it is not a secure site...although it may not be a hoax site it is not secure and can be hacked...further...when you ctrl, alt, delete...go into processes and have a look at what is running...if there are funny looking entries like...arye.exe...flkrd.exe...these could be backdoors left by a cracker...if this all seems a bit much for you then go to a techsite like majorgeeks or cybertech and register for free...these sites are full of computer geeks readyto assist you...I hope I can help in anyway...please feel free to pm anytime...