Daemon Tools 4.0.1 x64 allows you to mount CD or DVD images as a virtual drive. The program is free; it comes with adware BUT you can choose to install it without adware by unchecking "Daemon Tools Searchbar" at installation
The author says this 64-bit version contains a few bugfixes.
Dear Community, as promised, we released today the new X64-version of DaemonTools V4. It contains only small bugfixes, apart from that, the release
notes from V4 32bit are valid here, too. We wish our users a nice weekend and much fun with this new
Tools and Utilities
Product page: here