we have one pc with 2 separate hdds each with its own OS, with a power switch so only one hard drive with OS will run or be accessible at a time, mainly for this reason,
ours sons OS wont boot at all , ive tried the repair disc and says it cant repair it, the blue screen flashes up really quick so cant see what it says on there,
im going to detach his hard drive and connect it to ours to run malware and anti virus and check the hard drive which is a ssd is still healthy,

Is there anything i can do to his OS to try repair it while its attached to our system?

i cant do the log collecting as his system wont start at all

eta: ive run the sandisk tool and the hard drive is fine

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is there a way to use the v2 log collector for the hard drive with the problem OS that is now connected too my pc as a standard hdd? all the files on there are accessible