processing comes with own JAVA (8)
http://download.processing.org/processing-3.5.3-windows64.zip
-a- clean up:
-a1- backup your sketch
-a2- delete processing “install” dir ?like were you unzipped it?
c:\USERS\ < USER > \Documents\processing3.5.3.…
-a2- delete processing “sketch” dir
c:\Users\ < USER > \Documents\Processing.. with your sketch / libs / tools / modes
-a3- delete processing “system” dir
c:\Users\ < USER > \AppData\Roaming\Processing\
-b- reinstall
-b1- unzip processing-3.5.3-windows64.zip to your “install” dir
-b2-start
c:\USERS\ < USER > \Documents\processing3.5.3\processing.exe
( or a link to it ( like on desktop ) )
++ you will be asked if to (allow) run JAVA
it creates again
c:\Users\ < USER > \Documents\Processing
c:\Users\ < USER > \AppData\Roaming\Processing
-b3- install libraries again ( like via contribution manager )
-b4- run simple example and a demanding ( for you graphic system )
/ Files / Examples / Demos / Graphics / Ribbons
if there are problems ( GL ) might need update windows graphics driver
( while recently we see also here something like a update warning where GL not work after update driver??? )