But DxO has not always used pace interlok. It causes side effects at times. For example it (or other DxO V5 surprises) took out my Nikon Transfer which now crashes and cannot yet be reinstalled successfully. You can remove interlock from your PC by reformatting. I don't know for sure but supposedly interlok is on DxO v 4.5.1 too. I don't know when they went to interlok. I bought this software and can understand the need for copy protection but this is harmful and cuts sales - I am paying the price for those who hack?. If interlok is well set up it can probably work transparent to the end user I would guess. I do not like the idea of it taking over my pc tho. I have a mess to clean up and am still waiting for my REFUND. DxO V5 was released prematurely and is causing install and stability issues...on top of the program running slow and being 80-90% completed but being sold and represented as 100%.

This is from dpreview retouching forum 3 weeks ago:

"...The problem is: their [DxO] download manager sucks, it stalls. I had to try and download it several times before having the complete download, and even then it "forgot" to move the modules to the right place (I moved the files to the right place manually, LUDICROUS).

Then, they [DxO] use a vicious DRM scheme for copy protection, that installs an extension on your computer, effectively patching the kernel and in some cases introducing instability. It is - from a technological point of view, no different than SONY's rootkit - it is NOT removed upon deinstallation of the software, and writes all over your disk to make your life difficult in case you really want to eradicate it from your drive. Thank god OS X allows you to monitor File system events and therefore I can keep track of what it does, but on windows the usual solution is "back up your data and reformat". Great. As usual, these technologies just sc**w the honest, paying people, I am sure that motivated hackers could break their scheme. A lot of honest customers have been unable to use the software they paid because of glitches in the criminal PACE Interlok system. In a better world, the developers of this copy protection technology should be outlawed, hung, burnt at a stake, their properties confiscated, all the copies of their software including the source code throws into a black hole foor good...."