>I do not know where it came from. I assumed it was win98 utility, but it allowed me to modify user interfaces icons, buttons, etc. One of the utilities in there refreshed all windows icons, including office shortcut which periodically turns black. I do not know where it came from and how it got removed!
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That's TWEAKUI, not UITWIT. it's an optional component that you can install from the Win98 CD, the Resource Kit, or download from Microsoft as a part of PowerToys, a free but unsupported set of extensions to WIn9x and WinNT.