SHOULD I LET YOU LOG ONTO MY COMPUTER?
The simple answer is NO, but, as usual, nothing is simple. There are three circumstances I can think of (and there are probably more) when this should be fine and actually even beneficial.
- I have a yearly contract with The Geek Squad, an organization that is part of Best Buy, for support of my computer. For a reasonable rate, they will support up to 3 computers for me and take as many calls as necessary. Sometimes a call to them is sufficient to get an answer to your question, but at other times, you might have a complex question that requires someone to log onto your machine in order to fix it. Of course, you can take the computer to a store, but it is more convenient when, given permission, they can log in to fix whatever ails the machine. I have received similar service from Comcast.
- Occasionally, you might call a friend and ask how to do something, like work on a Word document. They say that they’ll be over next week. Wouldn’t it be nice to be able to collaborate in real time?
- You want to share something, maybe pictures, with someone, and the file is too large to easily send. Wouldn’t it be nice if they could just see them on your machine? There are a number of software products that accomplish this. You can check with the Geek Squad and Comcast or your own service provider to see what they deem to be safe.
Here is an article on a variety of tools. http://www.online-tech-tips.com/cool-websites/5-free-remote-desktopsharing-and-screen-sharing-solutions/ that you can choose from when looking for options like this.
I use Teamviewer (the current is version 12) because it was recommended to me a couple of years ago, and I find it easy to use. It is free and available at https://www.teamviewer.com/en/download/windows /
When using Teamviewer, you provide a code to the person to whom you are allowing access and then either they or you can move the cursor on your screen. At the end of the session, they log out and cannot get in again until a future session is initiated by you. So it is safe. They have full documentation available on their site.
Having said all this, be very selective about allowing others onto your machine. They would then have access to material that you might rather keep private.

A long-time computer expert and guide, John provides his helpful hints in this monthly BOLLI Matters feature. In the comment box below, provide questions or comments for John on any computer/tech topic .
john.rudy@alum.mit.edu (781-861-0402)