I have never tried to install it. Good luck with your installation.
If you installed 10g on your local machine and on windows you need to open a command line window and change directories to your <10g ORACLE_HOME>/bin . set ORACLE_SID=<SID> set COMPUTERNAME=localhost . run emctl.bat start iasconsole . and voila, it's working again. access on localhost:1810 or whatever is shown in your portlist.ini file.