For anyone else reading this in the future, this may have happened if someone had deleted a mounted folder through Windows Explorer, which by default could have moved the mount point to the Recycle Bin. This would then make the install fail if the disk holding the mount point was selected during the install and the mount point under the Recycle Bin wasn't configured as a clustered resource.

If this was the problem, emptying the mount point folder from the Recycle Bin should resolve it.