Norton Antivirus 2013 with Registry Mechanic for Free after Rebate

Microsoft Windows XP (32-bit) Home/Professional/Tablet PC/Media Center (32-bit) with Service Pack 2 or later
Microsoft Windows Vista (32-bit and 64-bit) Starter/Home Basic/Home Premium/Business/Ultimate Microsoft
Windows 7 (32-bit and 64-bit) Starter/Home Basic/Home Premium/Ultimate
Microsoft Windows 8 and Windows 8 Pro (32-bit and 64-bit) 

Minimum Hardware Requirements
300 MHz for Microsoft Windows XP, 1 GHz for Microsoft Windows Vista/Microsoft Windows 7 256 MB of RAM
300 MB of available hard disk space
CD-ROM or DVD drive (if not installing via electronic download) 

Browser Plug-In Support*
Microsoft Internet Explorer 7.0 or higher** (32-bit only)
Mozilla Firefox (current and the most recent previous 32-bit major releases) 

Email scanning supported for POP3-compatible email clients
For Vulnerability Protection, Identity Safe, Antiphishing, and Safe Web.
As made available by Symantec within your service period