ONLY if your Inspiron One 2330 came with Windows 8 PRO (which it probably didn't).  If it did not come with Pro, then you will have to purchase your own Windows 7 license.
If I buy the  Inspiron One 2330 with Win 8, can I add Win 7 Professional from the back-up disk supplied with my Studio lappy cos' it gives me 'XP Mode' as well which I need for some old Astronomy apps. Thanks.  
Adding Win 7.