If you have the Win98 product code, I would wipe the hard drive using a Win98SE floppy boot disk click here and do a fresh install from there. Assuming that you have backed up any important files that your mate might require, if any.
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation techniques
How to mine Bitcoin on Mac
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.