Adobe Photoshop CS5 Could not initialize Photoshop because of a program error [FIX]

Launching Photoshop CS5 on Windows XP gives the following  error message after loading splash screen.

Adobe Photoshop CS5 Could not initialize Photoshop because of a program error

There are no error codes shown and no errors in windows system or application log.
FIX : To fix hold down CTRL+SHIFT+ALT when you click to launch CS5. This clears preferences and then it all loaded ok.

Scoopz :Creator of http://blog.scoopz.com Computer Nerd with a bias towards anything and everything Apple. Petrol head with a 5.0L V10 507bhp 205mph car...and a plug-in hybrid BMW i8...and a 2.0L 25yr stripped out, rolled caged car for the track too. Owner of a giant Bernese Mountain Dog. Proud to be an all-round geek!