I'm guessing from what you're doing you're talking about Photoshop CS2. CS2 is pretty old and probably doesn't like the version of Windows you're probably using (CS2 was Windows 2000/XP).
Have you tried any of the free Photoshop alternatives? They're pretty good and up to date.
Here's a link to the best ones out there today:
http://www.techradar.com/news/the-best-free-photoshop-alternative