No idea, am not there.
I have provided info and please read the URL : https://support.microsoft.com/en-us/topic/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system-files-79aa86cb-ca52-166a-92a3-966e85d4094e
If can not get to C: then suggest try one of the Boot Disks from URL Provided as it has tools.
Use the Linux one to rescue anything you need.
Note : Win 7 Servers are no longer on-line for Activation (so I think) so fix or move to linux or buy a None-OEM Win10 if still able to.
Win10 End of Life Oct 2025. Find out if can run Win11 or not. Buy a new system Move to Linux Mint.
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Linux Mint Cinnamon Edition : https://www.linuxmint.com/rel_vera_cinnamon_whatsnew.php
FAQ's plus Minimum Requirements : https://linuxmint.com/faq.php
Less Command Line stuff than others. Check out the videos : https://www.google.com/search?q=linux+mint+cinnamon&client=firefox-b-d&source=lnms&tbm=vid&sa=X&ved=2ahUKEwjzu4eQ-8L8AhViAzQIHSZ2D8oQ_AUoAnoECAEQBA&biw=1536&bih=671&dpr=1.25
It Comes with Software as well there is tons of Software available : Open Source : https://alternativeto.net/platform/linux/?license=opensource check free and ....