I have a strange issue that I just recently figured out. There are times when I use Alt+Tab to switch windows, the alt+tab box with all of the windows on it stays on the screen. I finally figured out that it only happens during file verification.
If I right click on the icon in the taskbar and do a cancel, the Alt+Tab window goes away. Then I press No I don't want to cancel. It happens every time I go to switch windows (it's a habit I have) only during verification.
We have attempted to reproduce your issue but have been unable to do so. If you could let us know your operating system and architecture (x86/x64) and also the exact steps to reproduce we can investigate further.
I'm sorry I didn't think about adding all of this info, I just figured I wasn't the only one with the issue.
I use windows 7 Ultimate - Service Pack 1(latest version) 64bit. My Reflect version is 5.2 Build 6551. I have 16 gb of memory and I have a 8 core intel chip. I have several windows open, but that is nothing different. I never max out my CPU.
It didn't always do this, I'm thinking the last update is when it started but I'm not sure.
My steps are to simply press alt+tab during verification. I have 250gb or so backup so verification takes a little while. Because I have so many windows open, it blocks out the background. I have to move windows down to do anything. That is until I figured out what was causing it.
Just out of curiosity what happens if you refresh your desktop i.e. right click refresh or left mouse click to the right of the clock and date - time in your task bar which effectively minimizes all open apps. Left click once again to restore.