A: Possibly, if it's the same edition (e.g., Professional). Try it during installation. If rejected, you need a 64-bit-specific key.
– Be careful; Microsoft no longer offers it directly. Use known, trusted archives (e.g., Internet Archive’s MSDN copies).
is missing or corrupted, the safest way to restore it is using the built-in System File Checker tool from Microsoft Microsoft Learn in the search box, right-click it, and select Run as Administrator sfc /scannow