Had my Windows 10 upgrade working nicely in Bootcamp on my 2009 Mac Pro for the whole day and everything was going nicely.
Decided to upgrade to Parallels 11 so I could use it occasionally without having to reboot.
Deleted the previous VM for Windows 7 and them tried to create a new VM from the Windows 10 Bootcamp.
At first Bootcamp did not show up in list so I followed some Parallels troubleshooting instructions and set up using 'Install from DVD or Image file" and then selected my bootcamp disk in the source.
Tried starting the VM and got the error message "No Boot Device is Available"
Read another Parallels post to say this could be rectified by starting in Bootcamp and then running a disk check.
Tried to boot in Bootcamp and to my horror it now also has "No Boot Device is Available"
Looked for several hours online and tried several methods shown by Parallels articles, but still cannot get either Boot Camp or VM Windows to start up.
Thanks Parallels!!
I hadn't made a disk backup as I had no idea that Parallels could mess up boot camp so badly.
Last edited: Nov 27, 2015