I have BIONC installed on my main account on Windows 7 and when I switch to another account a dialog box comes up asking for a "host name" and "password" what exactly in the host name? The name of the computer? I entered the name on my computer and the main password but says it can not connect. How can I connect to BIONC client on my main account from the other account? Thanks

The host name is the name of the computer, although in this case it's just 'localhost' (without the quotes). The password isn't the computer's password, but a password generated by BOINC itself. Normally you don't need either the name or the password.

However, in this case, it's because you switched users. By switching users all access to BOINC will go lost. No, you cannot run BOINC from the other account, unless you specifically said so in the installer (Allow all users on this computer to control BOINC). But even then it doesn't work.

For much the same reason why your videocard driver will switch to the Windows provided one when you use the Remote Desktop function, will all programs running under user 1 be unavailable to user 2: They're running in their own sandbox.

The only option you have, if you do not use a GPU on any project for calculations, is to install BOINC as a service. The it'll run under its own limited user account, while you can allow all users to control BOINC with the option in the installer. Then you can switch users without a problem, as BOINC runs under its own account. However, if you do use a GPU on any project, you cannot use the service installation, as then your GPU will not be detected. Windows security measure protecting your programs from running in the same level as your drivers.

Oh and by the way, the program is called BOINC. No, we're not all typing it wrong. Really. ;-)

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Thank you very much for the very helpful reply! All I really want is not to have the dialog box pop up when the other person logs on to their account. Do I have to reinstall the client and choose the option you spoke of or can I configure it so it only runs on my account? Thanks again!

Is for the other user a BOINC Manager starting up?
If that's the case, you should be able to stop that happening. In BOINC Manager go:

If BOINC 6.10.58 or before, Advanced view->Advanced->Options->Uncheck "Run Manager at login?"->OK.
If BOINC 6.12.26 or later, Advanced view->Tools->Display and network options->Uncheck "Run Manager at login?"->OK.

That'll disable BOINC Manager to start up on that account. You will have to do this for each account where you do not want BOINC Manager to start up.

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AWESOME! Thank you VERY much, that did the trick! Take care