dbghelp-xfw dll missing when opening Photoshop CS3

#1
I have a HP touchsmart 600-1370a 64 bit with Win 7 premium installed. I used to run Photoshop CS3 and Photoshop CS6 no problems (both 32bit and 64 bits were installed upon initial installation). Recently my graphic driver was replaced by a HP authorised repairer and as they had problems with the touchscreen they restored my system to factory standard.
I then had to reinstall my programs but now on opening CS3 I get this error:
The program can't start becasue dbghelp-xfw.dll is missing from your computer. Try reinstalling the program to fix this problem.
I dont get the error when I open CS6.
I searched my system files and could not locate the missing dbghelp-zfw.dll but just found dbghelp.dll in various locations
Any thoughts?
 


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