Please, check if this is the solution that you need: "Could not load light wallet functionality"
This problem was solved in the recent versions, and there is a solution reported in Slack for the cases where the problem remains on some windows systems:
What needs to be done in such cases is to install microsoft visual C++ build tools, and for that you may first need to install .net frame work version at least 4.5.1. That took a long time. Maybe we don't need to install the whole visual c++ build tools, what we just need is some libs.
Please, check in your computer: "Control Panel"/"Uninstal a Program" (Windows), how many instances of this "Microsoft Visual C" are installed. Usually, with time, many old versions get accumulated there. You'd better uninstall them all and reinstall the most recent one (usually both x64 and x86 will be installed).
If needed, check at https://www.microsoft.com/en-nz/download/details.aspx?id=48145
( That's how I was able to solve it here on my Win 8.1)