No valid source can be found for Redist
Just gonna guess here, but....
That may be related to an application that you've installed (and may be running at startup) that requires an installation of the "Microsoft Visual C++ Redistributable"
Check here.... Control Panel\All Control Panel Items\Programs and Features
for any installed program that contains the word "Redistributable"
Select it and click the "Change" button and choose "Repair"
OR....
Check Task Manager -> Startup Tab
Disable everything there and reboot the system and see if the problem persists.
IF not then, re-enable them one at a time, rebooting after each change and see if you can figure out which one is producing your issues.