Color resolution changes when windows media player is opened

Hi,
one of two things is wrong
1.) the nvidia video driver is corrupt [unlikely in this case]
2.) ur Rundll32.exe system file is corrupted [mostly by a virus, highly likely]

so I would suggest
1.)u first update antivirus and run scan [but if the virus is new it may not find it]
2.)u get a clean copy of rundll32.exe
Get the XP CD throw it in the drive exit if it autoplays
start--run--cmd [brings up the command prompt]
enter following commands, [Enter] means hit the enter key on the keyboard
cd \ [Enter] {now u should be a a C: or whatever drive letter ur harddrive is]
cd %systemroot%\system32 [Enter]
expand {YourCDDriveLetter}\I386\rundll32.ex_ rundll32.exe [Enter] {the YourCDDriveLetter means something like D:}
it might ask you to confirm, so say yes to replace file.

you can optionally uninstall and reinstall latest video drivers from nvidia.com

==rohini

Thank you for your response.  I ran a virus scan with McAfee and nothing turned up.  I then tried to get a clean copy of that file and ran into some problems during one of the steps you gave.  When I tried to enter "expand c:\I386\rundll32.ex_ rundll32.exe" a message came up that read "can't open output file:  rundll32.exe".  I had put in the purple cd that says "Reinstallation CD Microsoft Windows XP Home Edition".  Am I entering the command properly or what is going on?  How do I optionally uninstall and reinstall latest video drivers from nvidia.com?  Any further input is appreciated.