I don't have a C: drive, but Sibelius insists that I must do, so what we are trying to do here is to temporarily create a C: drive, and then create a link pointing crucial directories back to my system drive, K:. After Sibelius is successfully installed, we can then safely remove the temporary C: drive.
First, we need to create a Virtual Hard Drive (VHD) as our C:\ drive. I learned how to do this via this answer:
- Start → run → diskmgmt.msc (accept all defaults... I'm not doing anything special below)
- From the menu bar select Action → Create VHD
- Choose the location and name the file (which will be the vhd) and specify the size and click OK. My file is K:\virtual_drive_c.vhd and the size is 1G, but I made it dynamic so it's actual size is around 16MB.
- Right click on the Disk # (underneath will be Unknown and the size and "Not Initialized"). Select "Initialize Disk" and click OK
- Right click on the black bar of the unallocated disk space and select "new simple volume". A wizard opens up an on the second page it lets you assign the drive letter. We want C: here. Complete the wizard and you're done!
- Start → run → cmd, then right click and choose "Run as Administrator".
- In the prompt, type the following:
K:\>mklink /j "C:\Program Files" "K:\Program Files" Junction created for C:\Program Files <<===>> K:\Program Files K:\>mklink /j "C:\Program Files (x86)" "K:\Program Files (x86)" Junction created for C:\Program Files (x86) <<===>> K:\Program Files (x86)
After that, Sibelius installation should run normally. In the installer, I still choose to install the program to K:, to avoid future problems running Sibelius, since the bug is on the installer, not Sibelius itself.
Afterwards, you can reboot, and safely delete the vhd file.