computer issues, will not be on much til fixed (tonight hopefully)

I'm having some computer issues, it is acting like a virus but it's not a virus ANY scanners are catching (not avg 8.5, not microtrend 6.5, not even the microsoft scan for malicious content dowloaded from this weeks update) but yesterday run couldn't execute cdm, now cdm can't even be FOUND on the computer, regedit won't run, my internet postage program won't run, avg can't connect to update, trendmicro can't transfer data, but I'm connected to the internet through dsl and can connect to other sites fine, basically it HAS to be a virus, but none of the scans are recognizing it- which is kind of annoying as to avoid this is why we have the antivirus protection to begin with. Besides that avg keeps telling me to do things stuff that I've already tried (and told them in detail in my first email to them I had tried) so that's frustrating also. Anyways, my dad is an IT guy so he's coming over tonight and going to *hopefully* fix it. But that's why if you email me today I probably won't respond or be on here today until after it's fixed. Just an fyi post.