HP has announced that it will refund the $14.99 Windows 8 upgrade price for people who buy selected new Windows 7 PCs from now until February 2, 2013.
Qualifying products:
HP Notebook PC
HP Envy Notebook PC
HP Spectre Notebook PC
Compaq Notebook PC
HP Desktop PC
HP Pavilion Desktop PC
HP ENVY Desktop PC
HP Pavilion AIO PC
HP ENVY AIO PC
HP ENVY TouchSmart AIO PC
Compaq Desktop PC
Note:This offer is only for US and Canadian residents.
Source