windows 98

There are several reasons for this.

In order to show the image on full screen your monitor has to e configured for current resolution.
So here comes the first reason: on WIN95 you had another working resolution (or monitor refresh rate, or colorgamma - high color, true color etc)
The next reason is in drivers: hence with the reinstallation of windows the drivers for video card were also reinstalled.
The majority of drivers have the option of resizing or moving display (somewhere in display properties/settings/advanced.. or just on a new tab in display properties - depends on video card and driver), and if in win95 it was done, in win98 all settings came to default.

So to overcome those unused gap just resize visible area using minitor controls.
(note that the settings for 800*600*high color with 75 HZ refresh rate are absolutely different then for 800*600*high color*85HZ)

Hope it's what you wanted to know.

The phrase "full screen" reminds me of DOS days. If you've just recently upgraded from WIN95 to WIN98, I can only assume that your PC is a little more basic (excuse the pun).

Resolution depends on the type of video card/driver you're using and, in part, to the type of monitor; but all that, I think, is irrelevant to the question at hand.

I suggest adjusting the settings of the monitor itself to correct the problem. Screen (i.e., monitor) display settings, outside of everything else, are often overlooked. You can adjust the screen display by using the tools available on the monitor itself. Experiment a little with the buttons and facets on the monitor. It won't do any harm to your PC. You might "mess it up" the first -- and maybe eventhe second -- time, but after you get the hang of it, you'll be fine.

Best of luck!

- Mark

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