Rosewill N300 PCI Wireless Card Broke my Realtek HD Audio

To start off, I'll tell how it all happened. First, almost 3 months ago I bought a PCI Wireless card from newegg, it came in a week later and it was defective. I returned it for a new one and got it another two weeks later (Very slow shipping). It was working, but when I installed what was on the disk it came with, my HD Audio Manager went wacky and said I was plugging in and out audio devices. I just clicked OK on all of them. So I got good speeds but I realized I hadn't any audio coming from my speakers. The realtek HD audio was set to default playback device and both ports on the audio jack were securely in. It simply wouldn't work. A restart didn't fix it either. So I uninstalled and reinstalled the drivers for the PCI Wireless card a couple of times, restarting time after time just going through troubleshooting processes in hope that one would fix it. So during the process, after the first time of uninstalling I found the card defective again only giving 0.8Mb/s download speed just as the first defective card. Over the whole convoluted process I hadn't fixed my speakers, my mouse drivers broke so I had to put it into a different port, and I have another defective PCI wireless card. So my question is, how would I fix my speakers? The speakers are in my monitor and what it's usually named is Realtek HD Audio or something but now it's named High Definition Audio Device. Are there any fixes I can try? Or is more information needed? Thanks!

Asus doesn't have the audio drivers on their site (None at all). I looked up my mobo and then audio drivers and found some realtek audio driver installer (Looked the same as the comes from Realtek, so it wouldn't matter which one I downloaded) and installed it. One restart later, it detected that I unplugged something, though I didn't. I unplugged it and plugged it back in and it still won't give any audio to my speakers (In my HP w1858 monitor). It still won't work, it just gives some static as it did before with this motherboard (One person told me it could be because of some EMF stuff or something).

I'm using a VGA cable and an audio jack. For some reason though, I can hear fuzz coming from my speakers. Like it's picking up frequencies. It's not intentionally from the computer though, it's not showing up as sound in my volume. This was here before it gave no sound though. The oddest thing out of all about this is that when I run certain programs, move my mouse, open up a picture, simple functions like that, the fuzz will change to a different pitch. This may be my motherboard?

I'm using my Logitech G930 headset right now, but it doesn't use an audio jack. It uses a USB 2.0 because it's wireless. When I plug a speaker, however, it gives off that fuzz still. I believe it is my motherboard now. I don't want to return my motherboard though, it'd be too much work to take out my CPU, heatsink, wires, everything. Even the speaker I plugged in won't give any sound. I'm afraid it physically damaged my motherboard. The only way I'll know I guess is to boot of of something else (E.g. ubuntu) and see if I can get sound.