Hmm...we're getting really to being stuck. The main obstacle is your lack of CD/DVD drive because I'm afraid that with this type of infection we'll have to access your computer from the external source using FRST. We can easily create Windows 7 DVD to access System Recovery Options and then run FRST. Surely without optical drive we can't do this. I suspect your MBR may be infected as well. I think at this point getting optical drive is crucial.