I was using version 8.2.2.2 U when I first encountered that problem. I am using DO on an SMP computer with WinXP Pro. Updating to version 8.2.2.3 U didn't solve anything. Here is the description:
After using DO for a while, at some point, when I go to "My Computer", it appears empty, although all of my devices appear on the folder tree. I should note here that after inserting a CD, or plugging an external HD, the newly found media are the only things showing up. At that time, it is no longer possible to drag and drop anything anywhere. I noticed that when that happens, windows explorer seems to retain all that functionality and that closing and restarting DO fixed the problem for a little while, so my guess was that it was not a system wide issue.
However, if at that point I try dragging and dropping something from DO to some other program, e.g. Nero, Winamp, etc., everything gets messed up (= DO hangs, the other program hangs or complains about sth and usually, the thingies associated with explorer, such as the taskbar, become non-responsive), and I have to kill dopus.exe from the task manager (because exiting and restarting it "normally" gets me nowhere and I end up with two or more instances of dopus.exe running but not showing up), then kill and restart explorer.exe, which again, fixes everything for a while.
The only program I can recall installing at the time when these problems first appeared was an update of ActiveSync to v. 4.2. I uninstalled, it completely, fooled around with DO for a while and the problem was still there.
Any suggestions or ideas are more than welcome
Alex
The fact that the My Computer problems happen in Opus but not Explorer makes it sound like something may be corrupting the Opus process (since Opus calls Explorer to generate the My Computer view, it should be the same in both programs). Thinking along those lines, I would disable shell extensions on context menus (as described here in the "Extremely Quick Fix" section) and disable shell image extraction (as described here in the "2." section.)
I tried everything, but it seems my problem has nothing to do with context menus, Alcohol 120%, iso files, video files, etc.. However, here is a clue: When I browse the other computers on my LAN, although the shares of each computer are visible on the folder tree, when I double click on a computer's name, no share appears. If I browse my computer's shares and then move back to the other computer, all the shares are visible. Still, no drag and drop.
Perhaps you look at your computer managment console. Look for the "not visible devices", the "Not PNP devices".
Is there a device which doesnt belong to Windows XP ?
If there is one, try to find the software to which it belongs.
In my case, there was a "SCDEmu".
I found it belongs to PowerISO.
So I removed PowerISO and took a look if it vanished.