Windows 7 (on mac via parallels) with time, sound, files corrupted

I have a mac and run windows 7 via parallels 9, everything has been fine till about 2 weeks ago when my daughter was using the computer she said something came up about remove parallels tools and she clicked OK.

I did go reinstall parallel tools and that went fine, but still having some problems that seem to be more windows related maybe?

If I go into the mac side things look fine I can start the virtual machine load windows 7 etc but I have no sound now in windows side of things.

Also noticed (maybe unrelated) Windows keeps telling me to turn on my antivirus (avg) which is already on.

Another odd thing at boot up windows 7 "My Computer" opens immediately on the main screen no idea why but it's annoying.

I right clicked on my computer to choose manage and it says that can't be found, ran sfc /scannow says some files were corrupted, gives me a directory to the cbs log which I cant even open so that's not much help.

I did fully update and run spybot, malawayres, superantispyware,housecall and avg beyond some tracking cookies nothing else was found.

The one I am really trying to fix here is that sound, when I mouse over the sound icon it says "no Audio Output Device Is Installed", if I click the sound icon it just says "Detecting Problems Hardware Changes might not have been detected" and there is just a red x over sound icon itself.

I went back to the mac side under parallels configure then hardware/sound I see it shows checked as enable, and default device for input and output, I go back to windows side check device manager shows parallel sound device working properly no conflicts, if i choose playback device i only see parallels audio controller it is enabled in device manager I see no sound card even, being a virtual machine I can't even figure out how to get into the bios, I have tried a few realtek 64bit win7 drivers just in case but nothing responded or worked.