WinME is the one that been reinstalled the most as it bluescreened a lot. Win2k is the stable one if I'm not mistaken.
Everyone his skills...
Pentium 200 MMX with Windows ME here...last installed: around 20 years ago
Only when my OS crashes. I dont have the skills to recover a Linux distribution, so a clean install is the fastest way for me, and takes only 2 hours with everything.
The OS that had the most reinstalls was Windows 3.11.
That took forever on 8 or 9 diskettes.
Recently i bought a 486/33 with a driver missing in the startup files.
The last owner had a Setup folder on the HDD, so i could install again from there... It took me less then 5 minutes and i had a fresh Windows 3.11 install.
Back in the days i didnt know that was possible... No internet, no information...
From Windows 95 i knew and made copy of the Windows 95 setup files to the harddrive. And install from there.