HP Pavilion laptop flickers!

Hello.

I have a HP Pavilion 6540eo notebook and I've been experiencing a very annoying problem the last few days. The thing is that my computer started acting weird, for no reason of which I can think of. The computer flickers when I try to watch a video (vlc, winamp, youtube etc), and it also flickers when I try playing a game. I don't think it's a problem with my video driver, since I've already tested other drivers without any result. (And in this special area, my situation is delicate, since I've downgraded from windows vista, and HP doesn't support xp, thus, I download the drivers from www.laptopvideo2go.com)

I've also tested adjusting the Hardware acceleration without any luck. I thought it was a codec problem at first, but now I don't know. The behaviour reminds me back when I had windows vista (Vista basic mode)

Is there anything I can do to stop this. I've already formatted it but with no luck what so ever. Help is much appreciated!


Thank You!

Specs:

Product Name dv6540eo
Product Number GP646EA
Microprocessor AMD Turion 64 X2 Mobile Technology TL-56
Microprocessor Cache 512 KB + 512 KB Level 2 cache
Memory 2048 MB (2 x 1024 MB)
Memory Max Up to 2 GB DDR2
Video Graphics NVIDIA GeForce 8400M
Video Memory Up to 895 MB with 128 MB dedicated
Hard Drive 160 GB (5400 rpm)
Multimedia Drive Lightscribe Super Multi DVD Writer (+/-R +/-RW) with Double Layer support
Display 15.4” WXGA High Definition BrightView Widescreen (1280 x 800)
Fax/Modem High speed 56K modem
Network Card Ethernet 10/100BT integrated network interface
Wireless Connectivity 802.11a/b/g WLAN
Sound Altec Lansing speakers

3D Sound Blaster Pro compatible sound 16 bit (integrated)
Keyboard 101 key compatible keyboard
Pointing Device Touch Pad with On/Off button and dedicated vertical Scroll Up/Down pad, volume control, mute buttons, 2 Quick Launch Buttons
PC Card Slots

* One ExpressCard/54 slot (also supports ExpressCard/34)

External Ports

* 5-in-1 integrated Digital Media Reader for Secure Digital cards, MultiMedia cards, Memory Stick, Memory Stick Pro, or xD Picture cards
* 3 USB 2.0
* 1 HDMI connector
* 1 VGA port
* 1 RJ-11 modem connector
* 1 RJ-45 ethernet connector
* S-video TV out
* 2 headphones-out
* 1 mic-in
* 1 IEEE 1394
* remote control infrared port (remote optional)
* cable docking connector

Dimensions 35.70 cm (L) x 25.70 cm (W) x 2.54 cm (min H) / 3.96 cm (max H)
Weight 2.80 kg (6.14 lbs)
Power

* 90 W AC Power Adapter
* 6-cell Lithium-Ion (Li-Ion) battery

What's In The Box HP Pavilion WebCam with Integrated Microphone

HP Mobile Remote Control