Hi
Its bit complicated.

I have 5 year old Compaq Pressario V3611AU notebook with AMD Atholon X2 TK-55 processor. Was using Windows XP and everything working fine. Recently I upgraded RAM to 2GB & processor was changed to AMD Turion(tm) X2 TL-60 2.00Ghz. I installed windows 7 and everything worked fine for a week with no issues.
Recently when switched on it showed red cross on volume device. When I checked in device manager the sound video & Game controller has disappeared.
I checked most of the site but unable to install the exact
driver.
Even I tried to add with Legacy
Drivers in Device Manager but failed to install the correct driver.Even I re installed my Windows 7 but same issue. When I click on Volume device to fix the issue end up with Hardware Changes has been effected.
Please help me whether it is an issue with Sound Card or with driver.