Drivers are definitely out. Some games are really iffy. Especially from the Win 9x era, where they’d do stupid things like look for a 9 in the version string of Windows, or get the amount of RAM as a 32 bit signed int, so refuses to install if you have 4GB RAM or more.
We had a lot of dodgy old DOS programs that were fine under Win98, but XP broke them.
Drivers are definitely out. Some games are really iffy. Especially from the Win 9x era, where they’d do stupid things like look for a 9 in the version string of Windows, or get the amount of RAM as a 32 bit signed int, so refuses to install if you have 4GB RAM or more.
We had a lot of dodgy old DOS programs that were fine under Win98, but XP broke them.