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I got a Compaq Deskpro ENS/P600 (the EN SFF [for "Slim Form Factor"] series) without a hard drive and neglected in a very dusty business environment.
I gambled on a small SSD and a SATA to desktop IDE adapter, cleaned everything inside and out, and installed the SSD. The Windows 98SE install CD recognized it.
I had to spend an entire evening locating the relevant Softpaq files (only four out of a few dozen thousand with cryptic names).
@arielmt huh! i didn't know the SFF standard dated that far back
@mavica_again Apparently so. It has a 98SE key/COA sticker on the side, and I swear I saw a 2000 or 2001 datestamp on the motherboard somewhere.
Today, I installed 98SE and the Softpaqs. ("98SE and the Softpaqs" is now my Rock-n-Roll tribute band name.)
I also turned on and started updating a MeLE PCG02, a Windows 11 IOT-like fully contained desktop PC. It started downloading and installing KB5089549.
From FDISK through Win98 setup to every Softpaq installed and a fully functional desktop with working graphics and built-in speaker audio took about an hour.
Windows 11 is still installing the one single update.