Hi NOMAN KASHIR,
- Which version of Adobe photoshop CS are you using?
You may try to uninstall and reinstall Adobe Photoshop CS and check.
Refer the link to uninstall a Program:
http://windows.microsoft.com/en-us/windows7/Uninstall-or-change-a-program
You may also check with Adobe support
Refer the link:
http://forums.adobe.com/community/creativesuites/creativesuites\_windows
Hope this information is helpful.
Praseetha K
Microsoft Answers Support Engineer