Windows 98 Freeware Have Old Computer With Windows 98 And Would Like To Clean Off All Unnecessary Software So He Can Use For Games

Have old computer with Windows 98 and would like to clean off all unnecessary software so he can use for games - windows 98 freeware

I had the Add / Remove Programs degragged unit and is still super slowly. Any software out there, which is freeware that can help clean things on this site? I know that does not add or delete from, as if you really want to reformat the hard drive recovery programs. I mean, you want to delete everything!