I have winMe also. I found this info at Microsoft, Article ID: 824433, it works on my system: Lost or misplaced Product Key for Windows, go to Start>run>type regedit.exe then locate the following key in the registry: HKEY_LOCAL_MACHINE|Software|MIcrosoft|Windows|CurrentVersion
I then left click CurrentVersion once and scroll to Product Key at far right.
Hope that helps
Good luck, newbeee