What is your OS ? How much RAM do you have ?
Does your system meet theses requirements ?
See this
link for more info.
Intel® Pentium® 4, Intel Centrino®, Intel Xeon®, or Intel Core™ Duo (or compatible) processor
Microsoft® Windows® XP with Service Pack 2 or Windows Vista™ Home Premium, Business, Ultimate, or Enterprise (certified for 32-bit editions)
512MB of RAM
64MB of video RAM
1GB of available hard-disk space (additional free space required during installation)
1,024x768 monitor resolution with 16-bit video card
DVD-ROM drive
QuickTime 7 software required for multimedia features
Internet or phone connection required for product activation
Broadband Internet connection required for Adobe Stock Photos* and other services
Photoshop problems....
