Change the thickness of scrollbars

To change the thickness of the scrollbars at the right/bottom of documents larger than the screen, adjust...
For the horizontal (bottom) scrollbar:
HKLM\System\GWE\cyHScr = 9 (DWORD decimal)
For the vertical (right) scrollbar:
HKLM\System\GWE\cxVScr = 9 (DWORD decimal)
The default thickness is 13. You can set the value to pretty much anything you like