Google has added a Remote Desktop feature to its Google+ Hangouts. Now you can provide tech support as if you are in the same room as the user. What's really nice about this remote desktop implementation is that Google+ Hangouts still allows you to see and chat with each other. Most remote desktop services don't include video or audio chat.
Hangouts Remote Desktop lets you help others by controlling their computer remotely (with their permission, of course). And because you're both in a Hangout, you can talk with and see each other during the session.
It's rather simple to get started. All you have to do is be in a Hangout and click View more Apps > Add Apps > Hangouts Remote Desktop. Since it's based on the same technology used in Chrome Remote Desktop, you can remain reasonably certain that the technology is both safe, secure, and stable.