Try to keep this simple

Windows Xp computer maybe 3-4 years old 1gb Ram Pentium 2.33GHz

After maybe 30mins to an hour of the pc being on. All my video and music (I mean everything. Stuff from the Harddrive or stuff from places like YouTube) have this problem where first of all the sound will stop working (but the file is still playing - you can see the progress bar moving and the time going up as normal)

Then after maybe another 15 mins it will only play 2 seconds of a video then freeze. You can jump it foward to another point in the vid, but it will only play 2 seconds and freeze again.

Ive had a look at my Java settings. Re-downloaded it and all seems ok
Ive had a look at the ActiveX and again, all seems OK (to my untrained eyes)

Any sugestions.

If you restart the computer it all works Ok, but after the hour or so it starts to go wrong again. Nothing else is affected btw

 

some kind of driver/plug in has probably fucked up. Format reinstall. Will alos speed you pc up loads too

 

Or maybe something is overheating, poss graphics card. Take the side of the case off to let some ventilation in and see how it goes.