Solve : no sound driver detected?

1.	Solve : no sound driver detected?
Answer» I suddenly lost the sound on my ACER laptop with WINDOWS 7 ultimate, I tried updating drivers, deleting and reinstalling. So I thought maybe the sound card was damaged. I then purchased a USB external sound card and I have the same problem. When I try to INSTALL drivers for onboard sound card I get ERROR code 39, when I try to install drivers for external sound card I get error 28. Is there a way I can recover the situation without reinstalling windows as I do not have the windows 7 disc. I would APPRECIATE some assistance.I took the liberty of moving this here... The FAQ Section is not for general Posts.

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