It really seems to me that a reformat would be best for you. Do you have any friends that know how to reformat, install drivers, ect? If so, see if you can get them to do it for you. It wouldn't hurt to learn yourself either, but if your not up to it you don't have to. Though if you are interested;
Ask yourself these questions:
Do you have the OS CD(s); Such as Windows 98
Do you know how to back-up crucial data on CD-ROMs
Do you know how to install and update drivers
If you can answer yes to these, then it shouldn't be too hard for you to reformat your own system.