I run BOINC on a Windows 7 PC with settings for different users. SETI tasks are associated with my personal settings. If I "log out" (but leave the PC on) will the SETI tasks continue to run normally? If not, is this inherent in the SETI software or does it depend on how I configure my PC and/or the SETI software? With respect to SETI tasks, what are the implications of having two or more users on the same PC? Thanks to all for your interest and response to this question.

Only if BOINC is installed as a service (protected application execution), will it continue to run when no one is logged in, but the computer is still on. The service installation will break GPU detection, due to services and drivers running in separate sessions.

With respect to SETI tasks, what are the implications of having two or more users on the same PC?

What do you mean, both running Seti for themselves?
Or just two users using the same computer, what happens to BOINC?

They can't run Seti for themselves, unless they both have their own computer.
Otherwise, you either have to install as a service (runs for all), or allow them to control BOINC, by checking that option in in the installer, when installing BOINC. Or just add their names to the boinc_admins group.

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Okay, thanks for your help! As I now understand it, the BOINC program can be set to "me only" or "everyone on this computer". I assume "me only" is the default. In retrospect, there may be some advantage to a separate, dedicated "user account" for BOINC which would allow me (and all other users) to "log off" without disruption of work in progress. A dedicated "user account" for BOINC has potential application to home, school and workplace environments where BOINC participation by "everyone on this computer" is not an option. Of course, this approach would require a designated "manager" for the "BOINC user account".