I get no audio for online vids (YouTube, etc)

Factual Questions
1

I’m baffled, and I hope someone can help me out. Starting only recently, I no longer get ANY audio while playing online videos, such as those on YouTube or iFilm or anywhere else. None of them will play the audio (the video works fine). At the same time, all audio works just fine when I play anything already on my hard drive, so it’s not my audio card or anything else hardware-related.

I run a home-built box, Intel 1.3Ghz dual core, Windows XP Pro service pack 2.

I’ve made no changes that I am aware of about the time this behvaior started.
Any ideas or suggestions?

2

I don’t know about iFilm, but YouTube’s player uses Flash. I’d try going to Adobe’s site and looking at settings or re-installing it.

3

Also try a different browser; if you’re using IE try Firefox or vice versa.