How can I instoll Microsoft PS/2 Port Mouse on Windows ME?

You should not have to install a mouse under Windows Millenium. If you have a particular mouse that requires specific drivers (But this is very unlikely) then you would have a CD to install it. Try checking the properties by going to Mouse in the Control Panel. Ensure that the mouse is properly attached to the port, it is easy to only partly insert it. Also ensure that you are using the mouse port and not the keyboard port. If you have trouble navigating with a keyboard, use a serial mouse while you sort it out.

Well there isnt any need to install the driver's however check as to the port is working If yes check as to there is a conflict in drivers or not