my laptop doed recently and a well meaning friend gave me a tower pc running xp
ive run malware bytes and defragged and also ran avast which did find and delete one virus.
the problem im having is when i watch a youtube clip(any) the picture is jittery and slow and the audio is out of sync.
this also happens when playing a dvd through windows media player.
Bizarrely, Vlan player and media player classic play dvds fine.
Im running 1.5 gig ram and have an athlon processor.
can anyone help me please?