FNV Diagnostics FNV Diagnostics 1.5.1 15 August, 202115 August, 2021 Updated UIO recommendation to version 2.20. Recommends updating UIO, when it fails to load, as it most likely would be 2.09 or earlier with missing VC++ Redist 2013. Skips the Alt+Tab test in windowed mode without OneTweak.