I have a dead Windows install in one of my partitions. It doesn't have any boot data anymore. Practically, it is only a filesystem dump. But I have access to read any files on its filesystem.
How could I identify which Windows version is it? In the ideal case, I think there should be some configuration setting or any file unique to the different Windows versions. For example, on Debian-based Linux distros, I could simply read /etc/debian_version.
Unfortunately, I have access only to a Linux box to reach its hard disk. So, solutions requiring a Windows (for example, digging in the version of ntoskrnl.exe, or checking some registry settings) aren't in my case, feasible.