|The term CARD is frequently mis-used. If your sound is built into the mboard, it is a sound adapter, but IT IS NOT A CARD!|
Tell us the make and model of your brand name system, or if you have a generic desktop system, the make and model of the mboard.
The specific model of a brand name system is shown on a label on the outside of the case somewhere, or it can often be determined by going to the brand name's web site.
The model, sometimes the make, of a mboard in a generic desktop system is usually printed on the mboard's surface in obvious larger characters, often between the slots.
"have recently reinstalled xp and have no sound "
Obviously, the sound drivers were not built into the Windows CD.
Whenever you load Windows from a regular Windows CD (or DVD) from scratch, after Setup is finished you must load the drivers for the mboard, particularly the main chipset drivers, in order for Windows to have the proper drivers for and information about your mboard hardware, including it's AGP or PCI-E, ACPI, USB 2.0 if it has it, and hard drive controller support. If you have a generic system and have the CD that came with the mboard, all the necessary drivers are on it. If you load drivers from the web, brand name system builders and mboard makers often DO NOT have the main chipset drivers listed in the downloads for your model - in that case you must go to the maker of the main chipset's web site, get the drivers, and load them.
There are lots of different sound chips or chipsets. You must get the right drivers and install them the proper way.
Your brand name system builder or your mboard maker has the proper sound drivers - ones you get randomly from the web are likely to not work properly.
DO NOT install sound drivers while booting the computer!!
That also applies to the drivers for many other things too!
When Windows detects the sound device while booting, you have it search for drivers and it doesn't find any, when it asks you to tell it where the sound drivers are, DO NOT do that - if you do that the sound drivers and associated programs almost always will NOT install properly !
CANCEL that, continue on to the dekstop, and install the sound software using the proper sound software installation program.
If Windows wants to install something for the sound AFTER you have installed the proper sound software, while booting or otherwise, let it do that - that's fine.
If you installed sound drivers while booting the computer, or if you installed drivers or software that didn't work (the wrong drivers or software) , go to Control Panel - Add/Remove Programs and un-install any listing for the sound BEFORE you install the proper sound software the proper way.