Teamviewer reset my password twice in the last 12 months. Kinda sucks eggs when this happens without notice and you are hundreds of miles from the host computer, it happened to me while in the hospital. I still have not figured out if this is done by them periodically via some kind of client sunset or if it is done across their entire system. If anyone knows, please post here and fill us in. Don
You can also try Remote Utilities. That's what I use. When Logmein (which I used to use) got rid of their free service, Remote Utilities made their service free for up to 10 computers. It actually has more features than Logmein.