On my side a PC with WIN 2000

Other side a PB Ti 800 MHz

Everything is perfect

Now again on my side a Wintel box

Other a PB Al 1,5 Ghz

Awful nearly useless due to larsen, it seems it's my sound which causes problem

E.g. If I whistle it goes on with Larsen and we have to reduce to an unusable level.

If on the PB side we whistle no problem

So How come on the 800 MHz everything OK and now with the new PB 1,5 GHz skype is useless.

Anyway it's not the soft but it seems to be induced from the PC side any suggestions

Regards