Windows 7 - Cant install drivers, MUI-file?

When trying to install my Sound Driver, by right clicking on PCI-device(theres nothing else, and that must be the sound.) it installs, but at end comes up with this error:
The resource loader failed to find MUI file.

Its a High Definition Audio-controller im trying to install, since theres nothing else. I tried to install other windows 7 drivers from the web, but i run the setup, reboot, and nothing happend. I tried most solutions, i searched for many days now, i really need my sound back.

Welcome to SF, rawsas,

So you looked in device manager, and deleted from there? Please post your system specs. Include the make and model of your computer.

ye, i deleted it, uninstalled, rebooted, tried most standard solutions. my specs from dxdiag under the tab system:

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System Information
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Time of this report: 1/10/2012, 13:26:49
Machine name: IOWNYOUBAD
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7600) (7600.win7_gdr.110622-1503)
Language: Danish (Regional Setting: Danish)
System Manufacturer: MSI
System Model: MS-7586
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz (4 CPUs), ~2.7GHz
Memory: 4096MB RAM
Available OS Memory: 4088MB RAM
Page File: 1834MB used, 6337MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 32bit Unicode

------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No sound card was found. If one is expected, you should install a sound driver provided by the hardware manufacturer.
Input Tab: No problems found.

Okay.

Install the latest bios:
MSI Global ? Mainboard - P55-CD53

Make sure HD Audio is enabled in bios

Im using liveupdate 5 right now, for some reason it would not install the drivers, but if liveupdate 5 dont work, i add a other reply later.

First thanks for helping me, but still no sound.

Theres still a PCI-device, yellow marker and the code 28, cant install drivers. I use live update 5 right, i install the realtek audio drivers, restart pc. Nothing new, when i go to the device mananger, right click on pci-device, update driver, theres only high definition audio and when i install that, i get the code 28 resources cant read MUI file.
BIOS: Ms.7586 VERSION 1.00

When trying to update to 1:B0 I get an error, press key, PC restart, nothing new. I dont get whats wrong. I hope you can help.

If you are having problems flashing your bios with the Live Update, then try the following:

http://service.msicomputer.com/html/...es/BIOS_FD.pdf

Sorry, i dont own a USB drive, on 1 gb or more. Are you sure this will fix my sound problem? I dont understand what flashing my BIOS does. Its only my sound not working, and i just gotta solve that my resources cant read the MUI-file. And flashing my BIOS should do that? Arent there other ways?

Sometimes, when a device is not recognized, an update in the bios will find it. I personally have updated a bios, after which the computer reported new device found. Not saying this will definitely be the solution, just one possibility.

Okay, any other solutions? My windows 7 is for some reason not activated, and my disc is gone. I still have the product key, so i install a windows 7 copy off the net. U know a good place? I will install it, then use my product key.