How do I download my photostream photosto my laptop
Credit: Apple KB Artice

If you are on a Mac:


From the Apple menu, choose System Preferences.
Click iCloud. Then select Photos.
Click the Options button and make sure that My Photo Stream is turned on.
This should store them in the PhotoLibrary that is in your ~/Users/[User]/Pictures folder


On a PC:


Download and install iCloud for Windows.
Open iCloud for Windows.
Next to Photos, click Options.
Select My Photo Stream.
Click Done, then click Apply.
This should store them in your C:\Users[User]\Pictures\ folder