Fixing recurring Windows Installer whenever Explorer is run

Event viewer

My PC (Win 10 x64) was having an issue where Windows Installer would run every time Windows Explorer was run (including showing the desktop on startup).  This somehow locked up the PC almost completely, except running task manager so that I could kill Explorer.  None of the suggested fixes (msiexec /Unregister, msiexec/regserver; DISM.exe /Online /Cleanup-image /Restorehealth; sfc /scannow) seemed to help.  So…I checked out the Event Viewer and saw the warning shown above, Googled “msvcr110.dll does not exist” and saw that I needed to repair the Visual C++ Redistributable for Visual Studio 2012 Update 4. And that took care of it–right before I was about to wipe the drive and reinstall clean.  I hadn’t seen this fix anywhere else, so I thought I’d post it for some other poor soul who manages to make their way here.