This is great! Glad you gave Windows a shot again (not because I'm a Windows fanboy but because Windows really is everywhere...). And really glad you took the initiative and went out and problem-solved your way into this job. Just keep at it.
I want to throw out one more suggestion: invest in a Windows machine for home use and switch to using it for the next few months. This'll help you get on your feet at work faster.
Your goal should be to look for creative ways to cope with whatever issues you have left. And if you get frustrated, problem-solve! I would even go so far as to give feedback to the
$1 so that, in a year or two, the magnifier gets to be as good as it is on the Mac.