W
This is a bug in the Intel display driver. Update the driver or disable opengl. See https://communities.intel.com/thread/116003 (Although, apparently, the buggy driver is now being rolled out to users, since I'm getting a lot of duplicate reports for this all of a sudden.) See also https://krita.org/en/item/angle-and-windows-ink-a-new-test-version-of-krita-for-windows/ for test packages that used direct3d on windows instead of opengl. *** This bug has been marked as a duplicate of bug 360601 ***