Actually, I've tested this, and .NET Framework 4.6.1 installs just fine on Vista. No errors whatsoever (I haven't tested .NET Framework 4.6.2, but I assume it's the same)
Unfortunately 4.6.2 doesn't work on Vista, installer shows the usual 'not applicable to your os', so 4.6.1 is the last working version on vista, and unfortunately, after you install 4.6.1, WU won't find any new updates even though it should install the 4.6 part of .net framework april rollup for Vista, so you have to install it manually, fortunately, the installer detects 4.6.1 version correctly even though 4.6.1 is technically not meant for us (or is it? while I was trying to install 4.6.1 a few days ago, it downloaded files for Windows 6.0, and official requirements do not mention any Windows based on 6.0 kernel and at the same time it installs with no problem, really weird).
Windows Vista Updates
in Windows Vista
Posted
Unfortunately 4.6.2 doesn't work on Vista, installer shows the usual 'not applicable to your os', so 4.6.1 is the last working version on vista, and unfortunately, after you install 4.6.1, WU won't find any new updates even though it should install the 4.6 part of .net framework april rollup for Vista, so you have to install it manually, fortunately, the installer detects 4.6.1 version correctly even though 4.6.1 is technically not meant for us (or is it? while I was trying to install 4.6.1 a few days ago, it downloaded files for Windows 6.0, and official requirements do not mention any Windows based on 6.0 kernel and at the same time it installs with no problem, really weird).