Windows 10: Chkdsk finding bad cluster

So I am trying to update windows, but it keeps failing over and over. Neither the cumulative update is installing, nor the 20H2 update is getting installed. So after some googling, I understood that running CHKDSK might solve the problem. So here I am trying to run CHKDSK and I am getting the following log.----------------------------------------------------------------------------------------------------------------Checking file system on C:The type of the file system is NTFS.Volume label is OS.A disk check has been scheduled.Windows will now check the disk. Stage 1: E

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Does chkdsk /b is working for bad cluster replaced file from another drive?

1. Got a fixed file from stage 4 of chkdsk like this. this is happened in drive #1.

Stage 4: Looking for bad clusters in user file data ... Windows replaced bad clusters in file 250 of name \temp\~1.mkv

2. Now ~1.mkv file is moved to another drive, drive #2.

3. If run chkdsk /b on drive #2, does chkdsk /b re-evaluate ~1.mkv file again and re-mark as fixed file because of bad cluster, and leaving messages about this on prompt? or just pass as normal file with no any messages?

 

Bad clusters - automatic repair can't get into computer?

So my computer came up with automatic repair - your pc did not start correctly. I don't want to lose my files so I tried system reset, restore, startup repair, basically everything.

I ran a chkdsk command which told me that it moved 1 bad cluster to the bad cluster file and that no further action would be required. Nothing haplened.

When I tried system restore it failed and my laptop told me to run a chkdsk /R command. When I tried this it told me the file is write protected and as I can't get into my computer I can't start command prompt as an administrator so I'm stuck. I'm desperate
not to lose my files as most aren't backed up as I was waiting to get a new memory stick.

 

Perform Upgrade of Windows Cluster & SQL Cluster from 2008 R2 to 2012 R2

I am looking to perform Upgrade of Windows cluster on which SQL cluster is running 2008 R2 and i have to upgrade the OS to 2012 R2.

Please can some one suggest or share some step by step guide which i can refer.

Thanks in Advance!!

Kumar