I downloaded Boinc on my new computer (Windows 10, version 1909) and the screensaver doesn't work. It just keeps saying "Screensaver loading..." and never loading. Using an Intel Pentium Gold processor. Any ideas?

Depends on what projects you're running.
Most projects don't have a screen saver.
I know Seti has an interactive one; while some projects only have a static picture or a generic demo (not related to what you're doing).
But most don't have any.
Though, it's said that demos and interactive screensavers, are using up resources that could be used for computing instead.

To get the BOINC screen saver working you require a couple of things:

- video card drivers installed that have OpenGL included; you can get this by installing drivers from the GPU manufacturer. If you allow Windows to install drivers, these generally lack components like OpenGL (for graphics) and OpenCL (for calculations). (*)
- you have to have set BOINC as the screen saver in Windows. Type screen saver into Search and click "Change screen saver". Make sure it's set to BOINC;
- the project has to have a science application with graphics application. At Seti@Home for instance these are only sent in combination with the CPU app, the GPU apps don't have one.
-- But if the project doesn't have a screen saver graphics application, BOINC will show its own screen saver. I just tested this, it works for me.

(*) For manufacturer drivers, go to:
- AMD
- Nvidia
- Intel
When installing these, choose the Clean Install option some of the installers give. Always reboot afterwards, even if it doesn't say you need to.

---