This is a Win2000 newsgroup. Other newsgroups deal with WinME. I assume
your question has to do with WinME.
If you attempted to upgrade a WinME system to Win2000 by using the
Win2000 CD to "modify" the existing ME, that cannot be done; you will
wind up with garbage. To get from WinME to Win2000 you must do a clean
install of Win2000.
Further, I believe not all PCs designed for WinME meet the more
stringent hardware standards demanded by Win2000. You may be lucky, and
you may not.
If the above has nothing to do with what you did/want to do, and what
you want is simply to reinstall WinME over a corrupt or very tired
version of that system, then you should simply use the WinME CD to do a
fresh install. (I think -- but go to a WinME newsgroup and ask your
question there WITH MORE SPECIFIC INFO ABOUT YOUR PROBLEM.)