Well... I bought a new computer last August and since then I have had to reinstall Vista for three or four times.
The first time, I couldn't get it to record DVDs. The technical assistance told me to reinstall Vista. I reinstalled it and still didn't work. After months fighting with the store, I convinced them to test the driver and they admitted it was a defective driver.
They got it changed and now it's working fine with DVDs.
Some months after, I tried to make some captures from VHS and it didn't work. My computer has capture board and should be able to capture from VHS. I got in contact with technical assistance and they told me to reinstall the driver. I tried it with no success. Got in contact with them again. Their solution: reinstall Vista.
Reinstalled and got it working.
After it, one day the Windows sounds simply disappeared. Media Player would work, but all the others sounds went mute. I tried everything imaginable and nothing. Imagine the solution: reinstall Vista.