It means it can't find the OS files to boot. If you haven't changed the config that might cause this then you should boot into recovery. Worst case your disk has failed and you'll need a new drive, new install and restore your files from backup.
It means it can't find the OS files to boot. If you haven't changed the config that might cause this then you should boot into recovery. Worst case your disk has failed and you'll need a new drive, new install and restore your files from backup.
Possible I didn't explain good .I see other picture only some I don't see like this one.So for this I have to make recovery of all computer is this correct.