I have installed ccleaner in several computers and notebooks and this is the first time this happens...
When running ccleaner the screen color depth changes automatically to 8 bits, then when I close ccleaner the color depth changes back to 32 bits, ccleaner does its tasks normally. This is a Toshiba notebook, windows 7 32 bits, nvidia graphics card, any idea?
It is fixed!, run in 256 colors was checked for the shorcut, I didn't know about the compatibility tab and wonder how that got checked... I guess the owner did it, the other apps were fine. So it was not too complicated after all, thank you Nergal.