Sound card
That was a dodgy job,
the licence for windows XP installed by this guy is not genuine and can get you in troubles with Windows updates.
If you have a valid Windows XP licence (check the sticker at the base of your laptop), you should reinstall XP home using the licence number on the sticker.
If you do not have a licence, well I cannot talk here...
Regarding the sound, that is not a big problem, you just need to download and reinstall the drivers for your laptop.
Post a new question on Fixya, giving details on your laptop make and model, you will get the link to download for drivers.
I will be offline for the following few hours.
Don't forget to rate the solution appropriately.
Thanks
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