Post by Bill Cunningham
I foud a file in my root directory called "boot???.dat". The three "???"
was three letters I can't remember. I installed on another partition
windows 10. I erased windows 10 and windows 7 didn't want to boot. I ran my
win 7 installation and there was a CLSID key in the registry that looked
like it might be deciding default windwos OSes. I also have linux in
So does anyone know the file I am talking about? Is that something
windows 10 would put into windows 7 root ? Windows 7 learning it is a pain
and an adventure.
Did you install Win7, then Win10, then Linux, then delete Win10 ?
That's the only part of this story, that would take zero work
to get into such a situation.
And you couldn't have entirely used the automation in each case,
Installed Win7 in automatic ("I don't care") mode
Enter Disk Management and "shrink" Win7 C: to half size.
Install Win10 in automatic ("I don't care") mode
Enter Disk Management and "shrink" Win10 C: to half size.
Install Linux slash as the next partition (could be Extended/Logical).
That's about the least amount of work.
Can you post a picture of Disk Management from when it was working ?
An alternative, is to boot Linux and install the "disktype" package,
a very small package. Then,
sudo disktype /dev/sda
and copy/paste the information into a new posting. That tool
will tell us what partitions are present. When you also tell us
the total disk size (available from sudo fdisk /dev/sda and
the "print" option), I can then figure out the size of the
"hole" where the Win10 used to be. Maybe.
In theory, you could put the Win10 partition back, using
TestDisk (from your still-bootable Linux). But that's more
trouble than it's likely worth. TestDisk is a royal pain to use.
In any case, a "multi-booter" person keeps backups, right ?
You're never more than one step from a disaster when you
do stuff like this. That's why we have backups, and we keep
multi-boot partitions small so the backups won't take
quite as long. Don't store your 1TB movie collection
in your Win7 Downloads folder etc. Store it on a
separate disk that can't get damaged by the "experiments".