Sound control panel not opening,all sound except Windows sounds are not playing (Win7)

[Zotobom]

For some reason all sounds have stopped,except for Windows sounds like start-up sounds and the sound of emptying the trash bin. When I try to play a YouTube video with no sound,it works perfectly,but a video that [I]does[/I] have sound just stops at the moment that sound plays. If I try to play music with Foobar,Foobar just freezes and crashes. The control panel,where you normally switch between headphones/speakers etc just doesn't open anymore. I've tried unplugging my speakers and then plugging in headphones. It automatically switched to the headphones and normally played the Windows sounds,but other sounds aren't playing. I think it's a virus,but i'm not really sure,that's why i'm asking.

Audio speccy:

Sound Cards
HD Webcam C270
Virtual Audio Cable
Screaming Bee Audio
AMD High Definition Audio Device
Logitech G35 Headset
Realtek High Definition Audio

Playback Device
Luidsprekers (Realtek High Definition Audio)
Recording Devices
Microfoon (Screaming Bee Audio)
Microfoon (2- Logitech G35 Headset) (default)
Speaker Configuration
Speaker type Stereo

Dutch to English translation:
Microfoon - Microphone
Luidsprekers - Speakers

[Zotobom]

Unplugged my speakers and restarted the computer so the sound switched to my headset. Still leaves me with useless speakers though.

[djjkxbox360]

Either Virus, broken sound drivers, or broken Windows files.

For these 3 things, there are 3 solutions.

1. Do a scan with an anti-virus
2. Reinstall sound drivers, easy way to do this is to go into device manager, find your sound, right click and uninstall. Windows should automatically reinstall the driver after that.
3. To fix Windows files, open command prompt, and type "sfc /scannow" without quotation marks

[Zotobom]

[QUOTE=djjkxbox360;44469367]Either Virus, broken sound drivers, or broken Windows files.

For these 3 things, there are 3 solutions.

1. Do a scan with an anti-virus
2. Reinstall sound drivers, easy way to do this is to go into device manager, find your sound, right click and uninstall. Windows should automatically reinstall the driver after that.
3. To fix Windows files, open command prompt, and type "sfc /scannow" without quotation marks[/QUOTE]

I did nr. 2 and 3 at the same time and then restarted,and it seems to have worked (although I think 2 is the one that fixed it). I'm very grateful,thanks!