Constant feedback

Audacity is driving me nuts. When I first got it, I had no problems with the quality of microphone recordings. Then, out of the blue-without changing any settings- one day I get a large amount of feedback just by clicking record. I took Audacity off my computer and put it back on. Again, everything was perfect. Now, today, again out of the blue- I’m getting feedback. I’ve never changed any settings. The feedback just appears.

Any recording from the microphone is unusable. My mic isn’t good, but it works fine with other programs and worked fine before today.

Any suggestions? I like Audacity, but if I can’t record… :frowning:

Thanks. -John T.

Do you have loudspeakers switched on?
Also, see here: http://audacityteam.org/forum/viewtopic.php?f=26&t=6301&p=25024#p25024

Locking this topic as there is no point typing everything twice.