In the startup menu choose the option for safe mode command prompt only.
If you truly reformat the hard drive, there is no need to uninstall anything; the reformatting process wipes out all the content on the drive. Generally, if you are not reformatting but instead just reinstalling, you should use control panel's add/remove to remove software, or the program's own uninstall program, before reinstalling. The uninstall/reinstall process is not foolproof however, as traces of uninstalled programs sometimes remain behind to cause problems. Reformatting eliminates that problem - most of the time. And remember those famous words: "" all your personal files and programs, or you'll never see them again. Btw, if the problem is a virus, some viruses can withstand a reformat; means a trip to the local professional.
This will reinstall your operating system and you might have to reload some drivers or some of your other programs.
To reinstall Windows 98 using the DOS prompt:
Otherwise, we just return to our … Navigator … did you think you were finished?