If you are just using .NET then you only need to install dotnet_runtime
. But make sure it is for your actual hardware platform (e.g. win-x86 in your example). Normally I would expect you to use the win-x64 version as you are most likely running WIndows 7+.
In general you should probably just let Windows Update handle this rather than doing it yourself. There is rarely a need for manually installing updates. You may even already have it installed through something else.