Would someone please be able to tell me how to do this step by step?

Thanks for your help in advance

since you're running windows 98. Make a bootable floppy disk first. Open DOS command windows (Start --> Run, type in cmd <returne>). Put floppy disk in A: drive
From DOS prompt, type: format a: /s
When it's done, go to C:\windows\command (something like this), copy format.exe to A:
With floppy in drive A:, boot from A: then type format c:
you're done

format the harddrive i did it b4 but forgot exactly what to do truy google

Go to either DOS (or Command from the run menu), when you see C drive with the cursor, just type: Format.

That should do it.