Adobe has betrayed me!!

[Aaronock]

Use Gimp.

Ew... GIMP is pretty terrible for serious illustrators. There are so many better options than GIMP for illustration...and many others that are cheap or free even.

Story Dude, just use Manga Studio and then do edits in PS at the end.
Your other option is to uninstall and reinstall the software.

Edit: The hubby said to make another login on your computer. Launch Photoshop. If it lags, it's because of the application data or registry for your username. If you do this, write a post or PM me saying what happens and he'll help you further from there. xD