OpenGL and OpenCL are different beasts - a Graphics Language and a Computing Language, respectively. OpenGL is commonly used for project graphics apps or screensavers.

Do you have AutoCad/Autodesk, or ArcGIS Survey, or similar programs installed on that computer? Seems as if "QSurfaceFormat" is related to that type of program, and not at all related to BOINC.

Some info about the issue, available for example here:
Error: Failed to create OpenGL context for format QSurfaceFormat()

And here: "Failed to create OpenGL context for format QSurfaceFormat..." when launching Autodesk products

There are lots of other links to that issue, if you search on Google for "failed to create opengl context for format qsurfaceformat".

Edit: Even this WIKI link could be of interest, since the error also mentions "ANGLE Open GL ES 2.0": ANGLE (software)

Where does the error message come from?

I can read that from your original post. But where does the error come from?

Did you open a file? If so which one and why open it in the first place?
Did you see it in event viewer? If so where exactly?
Where did that text segment originate?

And why post it in the BOINC forums if it didn't originate in any BOINC error file?

Because Boinc is the only thing running on that computer.

Well now, it isn't. You admit you run Boinc, Virtualbox 7, MSI Afterburner, HWInfo, Remote Utilities, Startallback, aside from (chipset & video card) drivers and other assorted programs that run under Windows.

In your error poqexec.exe is pointed at. This is the Primitive Operations Queue Executor executable that will run first upon a reboot after a Windows Update, to update all programs and services pointed out in the C:\Windows\WinSXS\Pending.XML file, before Windows starts again. So it might be something in a Windows Update that does that, including drivers.

poqexec.exe can become infected with malware, I will advise you to do run an AV scan on your system.
MSI Afterburner is a GPU overclocking utility, although you can use it to set specific fan curves to cool the GPU more proficiently as well.
HWInfo may call upon opengl32.dll because it reads all kinds of information about your system.

What's the motherboard make and model and the GPU that you added?
Are you using the GPU for calculations?
Since you do not have a monitor attached, do you have a VGA-dummy, DP-dummy or HDMI-dummy plug connected to the videocard to let the OS believe you do have a monitor attached?
I suppose you remote into the system when it's running. Do know that when you do so, most applications used for that will make Windows turn off the GPU because the hardware layer's driver switches to a built in (into Windows) one that doesn't have things like CUDA and OpenCL but is just a generic video driver that will show what's happening on all kinds of video cards. If you then stay logged in that way, the GPU won't be used during that time.

And as said, projects that use a screen saver use OpenGL for that. Though afaik none use an application that requires OpenGL 2.0, most all default to OpenGL 1.0 or 1.1 for compatibility with older systems. If you run work on the GPU, the only project I know of that runs work on the GPU and allows to run the screen saver is Einstein@Home. All others default to the screen saver being off, or the default BOINC screen saver. Which also only requires OpenGL 1.0, not 2.0

Hey Peter Hucker. Nice new name.