When you are running Windows Vista, Windows 7 or some of the Server versions, you cannot install BOINC as a service ("protected application execution") and use your GPUs.

It is not something for BOINC to fix. This is a Microsoft security feature, where it stops your user account from running in the same session as your drivers and services are run from.

If it has to be fixed, it will have to come from Microsoft, or the GPU driver manufacturers have to find a way to run their drivers without using them as a service installation.

There's a document on this at Session 0 isolation (Word document, can be loaded in Open Office Writer, not in Wordpad).

An excerpt:
In Microsoft® Windows® XP, Microsoft Windows Server™ 2003, and earlier versions of the Windows operating system, all services run in the same session as the first user who logs on to the console. This session is called Session 0. Running services and user applications together in Session 0 poses a security risk because services run at elevated privilege and therefore are targets for malicious agents who are looking for a way to elevate their own privilege level.

The Microsoft Windows Vista™ operating system mitigates this security risk by isolating services in Session 0 and making Session 0 noninteractive. In Windows Vista, only system processes and services run in Session 0. The first user logs on to Session 1, and subsequent users log on to subsequent sessions. This means that services never run in the same session as users’ applications and are therefore protected from attacks that originate in application code.

What Is Affected
Any applications or drivers that are installed as a service are affected by the following implications. Some drivers are loaded within operating system services or processes that are running in Session 0, and those drivers are also affected by the implications of the Session 0 changes.

For more information about GPUs, why they may not be found, why they slow your every day use down and much, much more, please read the CUDA/CAL BOINC FAQ on this subject.

The new Nvidia API that BOINC 6.10 uses has a minimum driver set of CUDA 2.2, 185.85.

If your present drivers are below this version, update first.
If your present drivers are below this and they're the last available for your hardware, you cannot update to 6.10; stay at the last 6.6.x version for your OS.

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