pc will only display 16 colors.WHY?

Could be a couple of things.

Start by running SFC (System File Checker) from the run box on the start menu.

This will replace any missing Windows files.

Then, you likely need to re-install your system drivers.

Start with the system / chip-set drivers for your motherboard.

Then, download and install the latest driver for your video card.

If needed, update DirectX (from Microsoft).
However, do NOT install a newer version of DirectX than is supported by the video driver.

Then, if needed, install the driver for your monitor.

A good source for links to drivers is www.driverguide.com

Chas

ICUD17L.dll is a dynamic link library file for your display. MMSYSTEM.DLL and Run32.dll are both core system files. (Operating System)
Reinstalling Windows will normally correct the entry problem in the Registry, that is causing WinME to be unable to find these files.
(You can use Start-Find to verify that these files are still on the hard disk.)
This is not the core of the problem.
Windows does not loose track of such important files without the registry becoming corrupt, or the hard disk is starting to go bad, or there is a virus in the PC. (These are the three main causes.)
When symptoms such as this appear, it is time to make sure you have a backup of the hard drive.
(Makes recovery easy, instead of a nightmare.)
Regards, Chris