This is the explorer bug I have had since...forever. I am running Windows NT 5.1 Corporate (XP SP2) build 2600.
The effects of this bug are as follows:
Elements disappear
No right-click
Left click works, but doesn't do anything
Won't open new programs or windows
Programs throw up random errors
Restores more than one window at the same time
Screen saver doesn't work
Programs can't be closed or terminated if they're unresponsive
Can't copy, paste, drag and drop or move anything
When web browsing, a new page won't load, or the screen will turn black
Programs can't be minimized, but they can be restored or maximized
No popup descriptions, or they aren't displayed properly
When I do minimize or restore windows, it's usually something else completely random.
Sometimes gets triggered by Shareaza (wtf?)
I can stop this from happening temporarily by closing two windows, it doesn't matter what they are.
But the bug comes back again every couple of minutes and gets more severe until I eventually need to reboot
I ran XPY over the fresh install, as it was ALREADY slow, I didn't like it so I reversed the changes, but these changes still remained:
Programs won't group
Quick Launch gets reset every reboot
No user image in start menu
No welcome screen, which does make boot faster, but switching users annoying
Ctrl+Alt+Delete goes do the "Windows Security" dialog
What I have done to fix the problem:
Re-apply the service pack.
Reinstall.
Format and reinstall.
Install it on a new hard drive.
Install it on a new computer.
It may or may not be related, but all-round, the system is incredibly slow even when the CPU is sitting idle. Also, the on-board sound card makes two very loud clicks about one second apart every few minutes.
My system specs are:
Intel Pentium D (I think) E2160 1.8GHz
Gigabyte GA-965P-DS3 rev. 3.3 motherboard
2GB Kingston DDR2-667 memory in dual-channel
Albatron 8600GT DirectX 10 graphics card
About 700GB in HDD space