It may be to do with your machine spec?
Can you post your system info (Help>System Info...) so we know if you are running a high enough specification.
Might be worth checking this out: http://helpx.adobe.com/photoshop/system-requirements.html
It may be to do with your machine spec?
Can you post your system info (Help>System Info...) so we know if you are running a high enough specification.
Might be worth checking this out: http://helpx.adobe.com/photoshop/system-requirements.html