The instructions were confusing as to which partition
on Disk0 to mark Active because DISKPART was giving you bad readouts from what you reported.
At this point, you should be asked to Detail Partition on each Disk0 partition so we could verify it intact and whether it is marked Active:
View attachment 100252
Once it's confirmed that 100mb or Win7 partition is marked Active, then run the Repairs with all other HD's unplugged - unless you want to detail each of the other HD's partitions to see if they are incorrectly marked Active.