Are Photoshop and OS fully updated and have you performed the usual trouble-shooting routines (trashing prefs by keeping command-alt-shift/ctrl-alt-shift pressed while starting Photoshop after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved and making a note of the Preferences you’ve changed, 3rd party plug-ins deactivation, system maintenance, cleaning caches, font validation, etc.)?
Thanks for your answer .
What do you mean with usual trouble-shooting routines and where can I find Information about?
He means what he says: Update your operating system via Windows Update, reset the preferences using teh magic keystroke, update all critical drivers for graphics card, printers, scanners, reset your color management to eliminate defective colro profiles from the equation...