I downgraded from vista premium to xp pro but have no sound help

This is another tough one.
Since GW does not have Win XP drivers available for your system, it will be difficult to find a sound driver that will work. You could try to use the Vista driver, but I would be skeptical that it will work to use that driver because of the way that sounds are processed in Vista/Win 7.
You didn't mention why you did the downgrade, but if it was performance related, Win 7 should work fine with your system. If there was a certain program etc., that you need, there is another option.
There are many USB soundcards that will will work well with Win XP, and they should not have the XP problem since their hardware is designed to work with XP. Note: If you go this route, make sure you choose one that is Win XP compatible. One other thing on this option, though. Your internal speakers may not route sound through the USB soundcard, which would mean then that you would need external speakers to get sound. I understand that may be a deal-breaker, which is why I would (unless you specifically need XP) either go back to Vista or upgrade to Win 7. Some version of Win 7 feature "XP mode" which allows you to run programs in a virtual Win XP environment. I have not had perfect luck getting XP programs to work, but it's worth a try.

Go to AVG's homepage and look for a removal tool. Uninstall the software and download Microsoft Security Essentials...It's free and perpetual. You may also consider upgrading to Win 7 or downgrading to XP. Vista is the reason many folks are back to XP and Microsoft's reason for creating Win 7.

hello, u may have to download the proper drivers plus data manager software from the manufacturers homepage,
they have to fit vista!

if there are just ones for winxp or lower win/versions available, either try connecting phone to a winxp/interent-pc and go through driver-install and so on
or think about downgrading your system to win-xp professional!

win vista is fine but not as reliable as winxp/pro!

good luck

Well, this may make you think twice:

I bought a presario from circuit city last year, and I paid $200 to downgrade to XP. Everything was fine until it crashed last week. IT went completely bizzerk. HP won't provide support, cause I changed it. Circuit City is out of business, not much help there.

Basically, I am completely #$%%@@.

I am now paying to get Vista put back in. :-(

If you have a Windows XP Pro installation disk, put it in the optical drive, restart your computer, on startup, go to BIOS settings (usually press [Delete] and set the optical drive as first boot device. Save changes and exit. When the computer starts it usually says to press any key to start from CD. Press any key and the windows installation will start. Make sure you format C: and you will downgrade to Windows XP Pro. If you want to upgrade to Vista again, you will need to know the keyboard sequence to start Vista from Its partition or have Vista install disk.

Now you need to find a Windows XP install disk that can match the licence number printed on the sticker at the back of the laptop and reinstall XP using your serial key.
You will have to download and install also the XP drivers, you find them on manufacturer website.

See links below on reinstalling XP on a Vista system:

FAQ: Giving up on Vista? Here's how to downgrade to XP

How to downgrade from Vista to XP News

How to Downgrade from Vista to XP

Downgrade Vista to XP pro

downgrading from vista to xp

Its a driver incompatibility issue. Many hardware components designed for Vista are incompatible with XP. This means that the Realtek audio driver may be the Vista version. Also, some hardware has of yet no XP drivers, so your audio components were designed for Vista only.
While it may be possible to "force" the driver to work, it may involve a number of hacks to the Windows registry and other files.

Well, we wont know until you try. In my opinion, your 32/64 bit issues will be solved, but you would still have the normal vista/xp compatibility issues.

But that is to be expected, like when we all upgraded from win98 to XP.

So - I would recommend downgrading to Vista 32 bit, or getting the 64bit software version of the programs you want to use.

Good Luck, and let me know what you did, and how it turned out! :)

Similar Problem already discussed here

Here ya go:

http://www.sony-asia.com/support/download/product/vgn-c25g/modelfirst?site=hp_en_AP_i