I've been using Paragon for backups and restores for years, and this is the first time I've had anything like this happen. I am running Windows Pro 64-bit 8.1 and HDM12. From my "About" screen: Paragon Hard Disk Manager™, version 10.1.19.16240 (22.11.12 ) Suite Component versions: hdm.dll, version 10.1, release 19, build 16240 biont.dll, version 10.1, release 19, build 16240 biont.sys, version 10.1, release 19, build 16240 Paragon Base Services Library, version 1.1, build 14840 (22.11.12 ) This was a free upgrade from HDM 11. I just got a new laptop, and I wanted to do a clean install of Win 8.1 on it, so I installed Paragon on it and backed up the C drive first. I backed it up to a USB stick that was formatted as FAT, so I had to use split archives. It came to a little over 8GB. I copied the archive to my desktop PC, and I tried to add it to the Paragon archive library on the desktop. Windows crashed, with a BSOD and a message about "PAGE FAULT IN NON-PAGE AREA" I tried it again; it crashed again, same message. After restarting, I saw that this time, Paragon actually did add the new archive to the library before crashing, but it showed up as 3+ GB instead of 8+. However, I ran the archive integrity verifier on it, and it went through all three files (a 4GB .pbf file, a 4GB .001 file, and a 131MB .002 file) and reported the integrity was verified. I removed it from the archive, and tried to add it again. Windows crashed again. I thought about what new stuff I had installed that could be causing it, and thought of VMWare Player. I uninstalled that, restarted, and tried again. It crashed again. The only other thing that's changed in the PC since I last ran a backup is I switched to a wireless keyboard and mouse that use a USB port rather than the PS2 ports in the back of the PC. I don't think that's the cause. I'm guessing it's the split archives that is the real difference here; I never had to use them on the desktop, because I always made my archives to internal NTFS hard drives that had plenty of space. But for this archive off the laptop, I had to use the USB stick, which needed split archives because of the FAT format. It just occurred to me that I should test this by removing and adding a non-split archive to the library, but I don't want to have to retype this if Windows crashes again, so I'll try it after I post this. Update: I removed and added a non-split archive with no problem, so I have to think it's the split that's causing the problem, although I have no idea why it should, or why it hasn't happened to anyone else that my limited googling skills can find. Can anyone shed some light on this? Thank you.