Windows 7: Recording Stereomix and Microphone - Constant Stuttering

Hello there!

First post here. Perhaps anyone of you have heared from something like that and knows a bit over this thing.

I have made for some friends over time often Audio Broadcasts. Under Windows XP Recording the Stereomix/What you hear function has always worked without problems with a Headset - Tried that with AMD and Intel chipsets, always did Work.

But no more under Windows 7 - Also tried AMD and Intel chipsets, onboard soundcards and Onboard in Combination with an X-FI usb soundcard - Speakers and Stereomix on the Onboard Realtek, Headset microphone on the x-fi.

Problem is that, After Recording for around 2,5 Hours - there are running around 250+ MB trough the stream - Sound on the listeners side begins suddenly to Buffer/Stutter quite heavily - It sounds like the sound is hacked into pieces. Sounds also a bit like an Echo.

Could it be that that new Sound Architecture of Windows 7/Vista... at least they are similiar be the Source of the problem, so thats not possible to Record for longer time any more?

Or could it be some kind of Restriction to prevent others from making longer Streaming Tasks - Would fit that theory that Stereomix/What you hear is so hard to find in Vista/Windows 7.

Anyway, in my opinion that seems like a planned Hardware Restriction. You get a certain Amount of Data trough and then: Lock - and Stuttering

Drivers tested are from Driver Discs and newest Sources.. no Difference - Same Effect.

Soundcards used: X-FI and Onboard Realtek
Motherboard - its an Sabertooth FX990 Board
Graphic Card - GTX
CPU - AMD Bulldozer

Have heared in general much that Windows 7 has some kind of stuttering issues combined with Recording.

Anyone knows something about that? Any help or information would be appreciated

Thanks and have a nice day all