Maybe you could ask in a Photoshop forum?
I assume you're trying to open the .psd file in Solidworks. If so, my first recommendation would be to contact your VAR if you have a current support contract. If not, I would recommend doing a clean reinstall. I would never upgrade my operating system. Wipe and reinstall. Too many weird problems crop up from upgrades.
This could be caused by:
a) The file is not really a PSD file but is rather some other format with an incorrect .psd extension.
b) A corrupt PSD file.
You could try the menu option Open As and select the file's correct format assuming option.
Also take a look at this repair psd file link to see if it may be related: http://www.psd.repair/