UI Unrespsonsive and 6.1.5
Windows 7 Professional

Prompt boxes and menu items are blank. The UI appears to fail to redraw anything inside the LibreOffice window.

Already tried creating new profile in the user/appdata directory. Issue is NOT profile specific.
Already tried the regedit entries on the 6.1.5 download page to disable OpenGL.
Cannot replicate issue on another computer. Although 3 computers are now affected by this issue. Was only 2 for the past week.

Any help is much appreciated.