I'm basically on call for family tech support, but I live in a different city from my parents. Also, they have Windows 10 and I do not. If I had access to their computer and could poke around I could fix things easily, but without Win 10 in front of me it's very difficult to direct them by phone (especially since they are not tech savvy to begin with).
Are there any good legit tools we could use so they can let me access their computer to fix things? That also would not leave them vulnerable to unauthorized access (or I guess not any more vulnerable than they already are). I have Win 7 on my main desktop if that makes a difference.