I have been googling this issue for a long time, and no full solutions seem to be out there.

For certain mkv files, windows hangs when moving, copying, or deleting. These files play fine in a player such as GOM player.

System: a fast windows 7, 64 bit box.

Results:

1. CPU change is negligible
2. Memory usage rockets up to ~100%
3. In cased of delete or move, "discovering files" dialogue box stays up for a long time
4. Rename simply shows spinning icon until it finishes
5. Action is completed after EXTREMELY long amount of time
6. Memory usage does not return to normal

"Fixes:"

1. Disable thumbnail creation (helps for some cases)
2. After move/rename/delete kill explorer with taskmanager, and relaunch to re-claim your memory

Even with the thumbnails turned off, the issue persists. I have also tried re-muxing a file, which worked fine, but still resulted in a file with the same above issues.