What I'd like you to do is use System Restore to go back to before you accidentally deleted your sound, see if that fixes this problem.
Here's what I'd like you to do.
- Click on Start, Programs, Accessories, System Tools and finally System Restore.
- Select "Create a new restore point" then click Next
- Give it simple name like G2G then click on the Create button
Once that completes, go back into System Restore and select a date prior to Jan 31 2008, which is when you made you first post here.
- Click on Start, Programs, Accessories, System Tools and finally System Restore.
- Select "Restore my computer to an earlier time" then click Next
- Use the left arrow < to the left of the date at the top to go back a month then choose a date a few days prior to when the problem happened (Jan 31 2008).
- Click Next then follow directions.
If all is well, you should have sound the next time your computer boots up.
Read through this and ask any questions before you start.