I am having the same problem as the OP, with the same version of Comodo Dragon, running it from Windows 7 Pro. XPS Document Writer works fine from Chrome, IE11, and Firefox, but not Comodo Dragon. I cleared my browser data including download history, but it doesn't fix it. I've tried running Comodo Dragon as the Administrator, checked the permissions of my %TEMP% folder and the destination folder, and even set them to allow full access to Everyone, but permissions don't seem to be the issue. I've also made sure that I'm not running in Virtual Mode, and I've disabled all my non-Comodo extensions. Any ideas?