i noticed that when i go to the avast! screensaver properties \ exclusions \ browse , the small icons in the file explorer and in the quick launch bar disappear ??? :-\ . icons of the desktop don’t disappear.
No, it doesn’t reproduce here. Sounds like a problem with resources, possibly because of the additional window that appears, with its icons and stuff.
The problem with resources is quite common on Windows 9x… and I’m afraid I don’t know about anything we could do about it. You may try to reduce the number of simultaneously running programs, if possible… :-\