When I want to get the current status or use any git command I will see these two lines of errors:
warning: unable to access \'C:/Program Files (x86)/Git\'
As indicated by @iltempo's comment - this error occurs because there is a reference to read the file C:/Program Files (x86)/Git
which isn't a file or doesn't exist.
A global git ignore file is a good idea - after creating one (if you don't already have one) - update the location that git is using so that it's used:
git config --global core.excludesfile C:/Users/me/global.gitignore
Alternatively to just remove the error, remove the reference:
git config --global --unset core.excludesfile