This is my " speculation " as to why my WM stops working once sfc has repaired the " corrupt files ".
In installing the WM, I had to replace the existing mose.dll from the Windows Mail folder with a 64-bit mose.dll that I had downloaded from the tutorial ( Windows Mail
sfc , upon repairing, must had replaced my new 64-bit mose.dll with the original one. That renders WM unresponsive afterwards.
This speculation may sound silly, but answers from experts in Mail or Programs would be appreciated.