I am trying to access my home computer while traveling. The teamviewer password that I set before I left home no longer works. Apparently it has expired. Can I still access the computer?
To connect remotely to a computer running TeamViewer you enter an ID Number, unique to each host computer, and a Password, a randomly generated code. The ID is always the same for the same computer but the password changes every time the host computer starts the program.
This is perfect for doing remote tech support because the host (the customer) must give the new password to the support person (connecting remotely) every time.
When using TeamViewer to access your own computer remotely, you can set a password of your choosing to be used instead of the randomly generated password code. That password will remain in effect permanently unless you change it.
Just click "Configure permanent access..." as shown below to set your permanent password.
Usually a password will only expire if the computer is part of a domain and a domain policy is set to enforce changing a password. If this is the case, you can only get into the computer again by plugging the pc back into the network where it was part of the domain, then login using your old password and when it tells you to change the password, change it.
If you have another user that you could login with that has administrative privileges, you can use that user to reset the users password.
EDIT: It appears the question is about teamviewer. This information was not added when posting this answer, so I didn't know it was about teamviewer. For the sake of history of this problem, I'll leave the answer + comments in tact.