I've been working on a computer that at first wouldn't start up, it hung at the windows startup screen. After lots of girations, running CHKDSK and then a repair of the operating system (XP) I finally got the computer to boot up. However it appears that there are no programs installed when you look at the add remove programs list there is nothing there, my anti virus program starts but then gives a message that it isn't installed. I tried to run Malwarebytes and the error message "Run-time error 0, Run-time error 440 automation error ...". I tried to install a new copy and that doesn't help. Internet explorer works and I was able to run Trend Micro housecalls but it only found one bug and that didn't make a difference. I'm guessing this is some infection but I can't figure out how to get rid of it. Can anyone help?