Missing my Sound, Video, and Game Controller

Hello, I just got the "No Audio Device is installed" message for the second time, and my Sound, Video, and Game Controller section on my Device Manager pulled a Houdini on me. I can't remember what i did last time to fix it, but I've tried everything that people have suggested on multiple threads concerning this. It was literally working last night as i was listening to music, today when i turned it on it said i had no audio output installed. I have an HP Pavillion dv9500. I upgraded from Vista Home 32-bit to Windows 7 Pro 64-bit, but never had a real problem until now. I tried to find the driver on the HP site, but the driver didn't work. I've even tried to restore my computer to a week ago when i got a system update, but it keeps failing.There is also an exclamation mark on the Coprocessor under Other Devices in the device manager, but i have no idea what it is. Does anyone have any suggestions?

Hi, I've had sound issues for the last month or so and about two weeks ago, I lost the 'Sound, Video and Games Controller' icon, from the 'Device Manager' section so I had no way to get access to anything.

My Product Spec:

HP Pavilion dv9705ea Entertainment Notebook PC
AMD Turion 64x2 Processor, Nvidia Graphics Card, Conexant HD SmartAudio 221, Old OS was Windows Vista, Upgraded to Windows 7 around14-16 months ago. Started having sound issues after a few updates from windows (guess the OS's were getting messed up - whatever method of upgrade is done it will always caus issues in the future.)
Updated all drivers from HP for Vista and Vista x64 (in compatibility mode) and Windows 7 and probably around 10-15 other UAA drivers... none of it worked.

Prior to losing the icon completely, I had managed to get everything up and running after I updated all the drivers, from the HP website. I basically did all that I was told after browsing the internet for 2 weeks straight.

Solution's simple: Download the driver for your PROCESSOR. whether it is Intel or AMD and it starts working.... unfortunately... because of so many upgrades and changes none of the solutions last.... I am trying to make a system image/ backup/ reboot CD so I don't have to waste my time thinking that Hp and/or Windows will ever get out a solution for this Worldwide issue.

Shame. I do hope this gets posted.

Saves a lot of money, unfortunately there is always a hassle because with electronics, everything being connected and whatnot, one solution causes another problem or else one problems solution damages other parts and device drivers.

I have the same exact problem help!!

-Go to Start Menu
-Type in "sfc /scannow"
It will begin a system scan.
Also it will begin a verification phase of system scan.
-Give it a little bit for the verification to complete.
When the verification is complete, It should find some integrity violations.