Windows 7: Sound not working since deleting audiodg.exe

I've just about come to my wit's end with this problem, I already have spent hours trying to fix it with no luck.

A few months ago this 'Windows Audio Device Graph Isolation' a.k.a. audiodg.exe process program somehow got onto my computer and has since been playing random sound effects at very random times and it's been annoying the hell out of me. If I try to end this process then it goes away, but my sound is always disabled with it. I restart the computer to get the sound back and it comes back alright, but so does audiodg.exe...

Anyway today I got so mad at it I changed the permissions and deleted the file out of the System32 folder, and as expected audiodg.exe is gone for good, but so is my sound! Everything is normal and working fine on my computer, all the drivers, my speakers and even the speaker icon is enabled and displaying sound bars, but nothing comes through the speakers at all.

Nothing I've will restore my sound, I've looked everywhere on the internet and there's no solutions for my problem because I'm guessing that the audiodg.exe might have been a malware program just to annoy me or something, and then just disable my sound if it gets disabled. I'm scanning for malware now but it's not fixing the problem so far.

Can somebody please please please help me with this?? I'm between a rock and a hard place here because I can't afford to get a new operating system Can't even get any help from Microsoft because my device is manufactured by Toshiba or some stupid reason.

EDIT: btw when I go into the Properties for my speakers and do the sound test, apparently it fails to play the test tone

Can you use a restore point before you removed audiodg.exe?

This may help you understand what audiodg is.

What is AUDIODG.EXE? - Larry Osterman's WebLog - Site Home - MSDN Blogs

No sorry it was ages ago it came onto my computer so doing a System Restore is a bit of a stab in the dark.
So if this audiodg.exe thing was an audio host program for Windows, would it be possible to download a new audio host so that the audio works again? I'll give it a google search anyway

Have you tried running a sfc/scannow to repair corrupted or missing system files? Or the Microsoft automated Fixit center? Last resort you could try a repair install or even a new clean install.

SFC /SCANNOW Command - System File Checker

Microsoft Fix it Solution Center: troubleshooting software issues

Repair Install

Clean Install Windows 7

Just click on the links for tutorials/link. We have many very nice step by step tutorials here, written by some VERY knowledgeable people. And Welcome to the forums!

Yeah I found out about SFC an hour ago, and after doing a scan with that I have my audio back now!
Thanks for the info, this has been very annoying lately and I'm glad it's fixed lol

Alright! Glad to hear you got it fixed. sfc/scannow has saved my bacon more than once over the years!

Glad your fixed. Why did you wait so long to address this problem?