there is no unlock, safe mode allows you to correct the problem.
You may experience any of the following symptoms on your Windows XP-based computer:
- You do not hear sound from the computer's speakers or headphones.
- A sound seems to be played, but you do not hear anything.
- A sound is played, but it stops suddenly.
- The sound skips or misses in some areas.
- The sound is distorted or scratchy.
- The computer stops responding when a sound is played.
- The computer restarts when a sound is played.
- You receive an error message when you try to play sound. Error messages could include the following:
Solution: here---> http://support.microsoft.com/kb/307918
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