Sometimes if you having many problems, a clean re-install is the best and quickest route.
The first thing you should do is back all important data you want to keep, i.e. emails, photos etc.
Now, if you don’t have a boot disc, you can create one through the Control Panel. In Windows, go to Add/Remove Programs and click the StartUp Disk tab and click the Create Disk button.
This will create a boot disk on a blank floppy for you with CD-ROM support.
If your system is so badly damaged that it will not create a boot disk, you can download one
here.
This is important, as you'll need access to your CD-ROM drive to do a new Windows 98 install.
Once the boot disk is created, test it to see if you can access your CD-ROM drive.
To do this reboot the machine with the floppy disk in the floppy drive and when the machine restarts choose "Start with CD-ROM support".
At the prompt type
d: and hit the Enter key. If the machine responds with D:\> you are in business.
Next type
format c: and press enter.
The C: drive will then be wiped clean.
Once the reformat is finished put your Windows CD-ROM disk in the CD-ROM drive, and type
D:\setup at the prompt.
Now just follow the on screen instructions.