no active mixer devices available

Just upgraded from Win XP Home to Xp Pro sp2 . Problem is no sound ! I dont see any sound card in the device manager. ( it worked fine with Xp home ) I click on the Volume COntrol & get the following error message "  There are no active mixer devices available. To install mixer devices, go to the Ctl Panel, Click Printers & other Hardware and then click other hardware, The program will now close. Whats up with that? It worked fine before I updated to XP pro
DjabseyAsked:
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rindiCommented:
You have to install all the motherboard's and also all the drivers of any addon cards.
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DjabseyAuthor Commented:
I have to re install  the motherboard & all the drivers?
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DjabseyAuthor Commented:
I dont understand. It was working just fine with Win XP Home. All I did was update to XP Pro Did I do something wrong w/ the upgrade?
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rindiCommented:
That is probably the case.

Anyway, it is always better to do a clean install to get rid of old stuff. If you still have the original XP home CD, and the XP Pro CD is an upgrade version, you can do a clean install, the installation process will just ask you to insert the home CD during the installation process.
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DjabseyAuthor Commented:
I actually did a clean installation of XP Pro. Formatted the hard drive & did a new installation. problem still persists.  Does anyone know where I can get the motherboard drivers for this moterboard?

Board: Micro-Star MS-7255 1.2
Bus Clock: 133 megahertz
BIOS: American Megatrends Inc. V1.1 12/11/2006
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rindiCommented:
Go to the MSI site and enter the mainboard model, then you should be able to download everything necessary.
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