Redistributable Microsoft Visual C++ | Simple & Full

Removing older versions (such as 2008 or 2012) will break the older games, legacy corporate software, or media tools that explicitly depend on them. Leave them untouched unless you are certain you no longer run any software from that era. Do these packages slow down my computer?

Once installed, it works silently in the background. It provides standardized code libraries that help applications run efficiently without every developer having to reinvent the wheel. redistributable microsoft visual c++

You need both because your computer runs a mix of both types of software. Removing older versions (such as 2008 or 2012)

You may see:

Include the appropriate .msm files in your installer project. legacy corporate software

This is correct. Do not remove them.