My laptop have no nouns since i have to reboot?



Answer:
You may own to reinstall it, go to the produce web site of your computer, look from a connection or option that say something like driver downloads, from within it will either ask for the model number or product number of your computer, once you go and get to the downloads for your computer, it will have a relation to download your sound driver.
download and istall nouns driver
Try System Restore to a date when all be good.
Start >All Programs >Accessories >System Tools

Using System Restore too various times can cause
more damage than good. After doing a restore
that does not fix a problem, consequently UNDO the
Restoration, and try another restore point, or
just do the UNDO.

http://www.microsoft.com/technet/prodtec...
Frequently Asked Questions Regarding System Restore contained by Windows XP