To install or reinstall Microsoft Plus! from the CD-ROM, the key on the sleeve of the CD-ROM is required. REGEDIT can be used to retrieve this key from the Registry, but is easier with the System Properties applet in Control Panel.
Editing the Registry should be done only by experienced users and with extreme care and the Registry should always be exported or backed up before any changes are made.
1. Start the REGEDIT.EXE program.
2. Go to the key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Current Version\Plus! ProductId
The key contains a numeric string with groups of five, three, seven, and five digits. The three and seven digit groups are the CD-ROM key.
There will be also a key for CD-ROM key for Windows 95.