Those old operating systems are quite a pain in VirtualBox. Qemu does a much better job, in this case. VirtualBox's emulated hardware is too new for some system

Those old operating systems are quite a pain in VirtualBox. Qemu does a much better job, in this case. VirtualBox's emulated hardware is too new for some systems, and Win98/Win95 flood the CPU during idle time (because that's how things worked back then), causing the input processing from the VM to lag significantly. Regardless though, this would legally require you to acquire a licensed copy of Windows 98, which will only become harder and harder down the road. Unless Microsoft decides to "free" all legacy software at some point. ReactOS and WINE solve this problem in a different way, by providing open source solutions that everyone can use, copy and archive without cost or consequence.