可以给一个ps的序列号吗？

You need to purchase to get a serial number

If you registered your software when you originally installed it then you might be able to find your serial number in your Adobe account online in the Products section.

Find your Adobe product serial number quickly

Error "The serial number is not valid for this product" | Creative Suite

http://helpx.adobe.com/creative-suite/kb/error-serial-number-valid-product.html

Error unable to validate serial number | CS6

http://helpx.adobe.com/creative-suite/kb/unable-validate-serial-number-ccm.html