@jameswoodcock Oh, anyone remembering the Norton Utilities from the DOS times? I ran Norton Defrag – err, Speed Disk – then and yes, it had something "therapeutic".
No idea about Win98 though, sorry: I ditched Windows 1995 (throwing it threw themselves so to say) and installed an operating system instead 🙊 💨
@IzzyOnDroid @jameswoodcock I even took the pain to understand which blocks were unmovable and why, so I could manually move them to the beginning of the disk. After three failed attempts, my system could boot again… 🙈