Display stripes problem with TV tuner and DShow

Hi all,
I have a weird problem on 7; I have a decent system: Athlon 2 x4, 8Gb RAM, Gigabyte 4550 display card. All drivers are up to date, same with firmware and it's an overall "clean" machine, software-wise. Trying to install a TV tuner (AverMedia) I ran into the following very weird problem: On playback I have some annoying thin horizontal stripes on the left third of the display region (see attachment). The stripes seem lagged from a few frames behind. What's even more weird, they disappear when there's processor activity, they come back when CPU is idle (<5%). I tried a number of actions:

- Disabled all power saving features; no good
- Swapped video card with NVidia; problem persists
- Swapped TV tuner with different brand/chipset; problem persists
- Tried tuner in another computer; works like a charm
- Tried to set processor affinity for TV player; doesn't help

Having taken all these steps, it appears to me to be either a software problem, probably pertaining to DShow synchronization, filters or something, or some DMA problem... I can't pinpoint this, but it's very annoying. Every other media works fine (video playback, games, Direct3D, OpenGL). Do you have any suggestion?

Thanks

I found the problem source. It was C1E support in BIOS... it seems C1E state does not agree with this usage. I'm not sure why (failure to acknowledge by TV card, motherboard failure because of voltage inconsistency... no idea whatsoever). Hope this helps someone who runs into this problem.

I had same problem with with KWorld PCI Hybrid TV Card DVB-T 210SE , exactly the same stripes on analog antenna and composite/S-Video input . Digital (DVB-T) channels appear OK. My system is MSI 770-G45 mobo , 4 GB DDR3 1333 Kingston and GeForce GT-240

Hope this helps someone who runs into this problem.

I disable C1E in BIOS and problem solved

Thanx dynu