No Audio After Using Audactiy

Hi there.

I hope someone can help me. I was using Audacity and after reading an online guide on how to lower and increase volume with the program I tried the instructions and now my whole laptop has NO audio.

I opened Aud. then opened my .wav audio file “Select All” then “Effect” and “Compression”. I increase to 4.2 then let the program work. After my clip had no audio. Now, nothing has audio. I tried going back with the clip and lowering the compression but that did not work. I have rebooted, uninstalled, and still nothing. HELP. I can’t get any audio to work and this has never happened before.

Also, I dont have any restore points to go back to so I am really in a bind here. Any thoughts?

I am running XP Service Pack 2
Toshiba, Intel Celeron M CPU, 80GB hard drive
1.60 GHz