I already lost a 5 dollar disk due to the windows built in disk burner being inadequate and horribly built. I made a bunch of blu Ray data disks and they are all still open and windows will not let me finalize them. I tried finalizing one in third party software by adding a small file then clicking finalize disk, and it worked but destroyed all the previous stuff on the disk. These disks are expensive m discs and I'm not going to make another coaster. I need to know how to finalize the disks I already burned in windows, I will start using the third party burner software but I already burned a bunch and need to close them to use them in other PC's. When I right click the disk in windows there is no option to finalize, when I go into global settings and tick the boxes to finalize after burn/eject it still won't finalize. I have like 40 dollars in open disks I need to finalize.