For the wmp problem:
Open wmp8 go to Tools>>Options then untick the "allow internet sites to uniquely identify your player.
The software compatability
Go to the programs .exe file, right click it and go to properties>>Compatabilty check the "Run this program in compatabilty for and the make your selection.
If you system is running slowly:
Get a program called TweakUI, disable the animations in all menus and all fading.
You just have to tweak your system until it runs like you want it to, there are so many tweaks out there you would be amazed.