Try this - In explorer find the folder called desktop that contains your desktop icons and these files. I suggest you open explorer highlight your C drive and then search for one of the files.
In the search results look for the file in a folder called desktop. Make a note of the full path to this folder then navigate to it in explorer. Now cut and paste them somewhere else. (I always have a folder called upgrades underneath MY DOCUMENTS to store such files)
I`m sorry I work with XP now so I don`t know exactly where your desktop folder may be in Windows 98 - I`m sure someone will let you know if you can`t find it using the above.