One way I used to install Dune2000 on Win7 x64..
Get your Dune2000 disc or image and go to Explorer.
Next..
Create a directory on One of your harddrives c:\ for example c:\Dune2000. .
Now copy the content of the Dune2000 disc to your newly made directory, all the files .
Now your done and you can select the Dune2000 exe.
The game should run fine. .
Note: if the game wont run move it(entire directory) to program files(x86)..
The game worked for me on win7x64 in a directory (also known as a folder) on my root c:\ drive in a newly named folder..
Attention: : if this works on win8 or Win8.1 i really dont know
I' m planning to use the same method on Win10 x64 but i have to find my Dune2000 disc first. .i'l keep you updated on my findings
Have fun