Installed on my HP netbook which I know that is not "enough" for Photoshop.
I can do most of the functions, but just slow.
However, when I want to "Save" or "Save as", there is nothing happen.
I wait and wait and wait.... not respond at all...
Is there anything that I can do for that?
My guess is that your display size is less than 1024x768 (the minimum for Photoshop), and the OS doesn't have enough space to open the save dialog on your display.
You can increase the display size temporarily in the OS settings, or use a virtual desktop expander. But if your display doesn't meet the minimum requirements, you are going to face a lot of problems running Photoshop.