Vista - Vista x64 display distortion/pixelation problem

i have a dell studio 15 laptop running vista 64-bit with an intel graphics media accelerator 4500mhd graphics card and the 1920x1200 resolution. i just recently upgraded to the 64-bit edition of vista home premium (from 32-bit) with all the latest drivers for the graphics. please excuse me, im sort of new to computers so please speak in lehmans terms!

after playing a movie, after i close WMP certain parts of the display are kind of distorted/pixelated (see attached picture) but when you run the mouse over them they return to normal and when you click refresh on the background, the wallpaper image returns to normal. What could be the problem?

Thanks in advance!

interesting, your resolution is showing correct but i just need to ask, is that a print screen operation without doctoring?(print screen and save it in paint), if this is correct, your desktop is being scaled from a low resolution to a high one thusly making it blur, like looking at a small picture and making it bigger (it will look the same). it is because after a full screen application, your desktop resolution cannot return flawlessly, when you watch a movie, depending on the width and height of the movie file, thats what your resolution is scaling until you close full screen mode in wmp.

the only doctoring i did was scale it down 40%, but otherwise it looks identical to when the problem occurs.

can you replicate the problem and print screen without scaling it down, this website scales automatically.

sure, i will try to replicate the problem.

here you go, i was watching a movie from my hard drive and minimized WMP and this is was i got.

cheers, helping us better understand the problem helps us to find the solution

my response showed up before yours did, how that happened i dont know lol

it appears to be vertical interlacing? but not all things are affected, very strange, let me dig up some info and get back to you
EDIT:
ok i need to know your exact specs of your laptop, if you know the model number that would be great, i suspect that the 64 bit drivers are not installed and are being emulated.
http://support.euro.dell.com/support/topics/global.aspx/support/downloads/en/downloads_splash?c=uk&l=en&s=gen&~mode=popup&file=285718
graphics driver^ 64bit
http://support.euro.dell.com/support/topics/global.aspx/support/downloads/en/downloads_splash?c=uk&l=en&s=gen&~mode=popup&file=265073 <<<chipset drivers for vista 64

Specs are:
Dell Studio 1537
Intel Core 2 Duo T5800, 2.0GHz, 800Mhz, 2M L2 Cache
3GB, DDR2, 800MHz 2 Dimm
Intel Graphics Media Accelerator 4500MHD
250G 5400RPM SATA Hard Drive
Microsoft Windows Vista x64 SP1 Home Premium Edition, English
Dell Wireless 1510 802.11n Half Mini Card
Integrated 2.0M Pixel Webcam
Hi Resolution, glossy widescreen 15.4 LCD (1920x1200) w/ Camera

i got all the 64-bit drivers from the dell website. i reinstalled the graphics driver (Mobile Intel 4 Series Chipset Family, version 7.15.10.1608) with the newest version from intel's website. the laptop originally came with x32 Vista Home Premium but i wanted x64 so i could upgrade to more memory at a later date.

i also have the intel turbo memory driver/program/etc... dunno if that would be causing this problem but just thought i would mention it.