Upgrade from Win 10 build 1607 to 1909 has shifted image sideways on monitor

I have a PC which I recently reinstalled from scratch because the Windows
Update mechanism was no longer working and all the "try this" remedies
failed to cure it. So it's a brand new vanilla build of Win 10; the only
exception is that I installed Classic Shell to give me a "proper" Start
Menu.

The installation was by downloading the installation files from Microsoft as
part of the "reinstall your PC" option, and I chose to wipe the disk. So
there was no legacy of the previous installation of Win 10. Initially Build
1607 (I think) was installed, but this upgraded itself to Build 1909 as part
of the normal Windows Update process with a newly-installed PC.

Having upgraded, on the next reboot (and for ever since) the image on the
monitor, right from the initial "rotating ring of dots" early in the boot
process, was shifted to the right, and this also affected the desktop once
that appeared. The left hand side of the desktop starts about 1/3 from the
left of the image on the monitor, with the right-hand part of the desktop
being to the left - the whole screen is wrapped round. It is the same at all
resolutions and refresh rates, from 1920x1080x60 down to 800x600x25
(interlaced), though I think the point at which wraparound occurs changes
with resolution. The horizontal shift controls on the monitor and on the
graphics card applet both move the image, but it is the *whole* image: it
does not alter the point at which the desktop wraps round from the RHS to
the LHS of the screen image.

I can't be bothered to get the PC out again to take a photo of the screen,
but this is a simulation of the sort of image I'm seeing, using the desktop
of my Win 7 PC. https://i.postimg.cc/7L90NZ0x/Win-10-wraparound.png

It only affects the VGA (D-Sub) output from the graphics card and/or VGA
input to my monitor. Using the DVI output instead (and corresponding DVI
input to monitor) everything is fine. I've proved that another PC can use
its VGA output to drive the VGA input via the same cable, and that does not
experience the fault. The VGA output on the Win 10 PC used to be fine. The
monitor's on-screen parameter display (pixel resolution, horizontal and
vertical sync frequencies) identical for both VGA and DVI.



I've confirmed that the graphics card driver (ATI Radeon HD 7310) is one
provided by ATI, rather than a generic Microsoft one, and the ATI control
panel applet says that the version of the driver is the latest available.
Windows has correctly detected the make and model of monitor; it is not used
"Generic PnP monitor".


It's no great hardship to drive the monitor from the DVI rather than VGA for
that PC, and to connect another PC to VGA (rather than DVI) input. But I was
curious whether anyone else has noticed the same symptom after upgrading to
1909.