Boot sequence is my WD hdd, then optical drive.
The external drive is disconnected.
After digging deeper, my assumption about C drive taking the X letter was wrong, coincidental I guess. Apparently X is some setup default (?). There are only some windows sys files on the mysterious X partition. The C partition is nowhere to be found.
When I boot I get the msg that windows failed to start and have the option to launch startup repair or start windows normally, either will result in the system recovery screeen, which ultimately doesnt work. There is no OS to select to repair. If I choose use recovery tools and try startup repair it reports: startup repair cannot repair this computer automatically, with a problem event name: StartupRepairOffline
I can go to command prompt and tried discpart list disc which reports no fixed discs.
My bios does recognize the WD hdd however.