AVG for Windows XP

Can I use the free AVG version for my Windows XP system?

Noticed that I can download past AVG versions as well as, is that a better way to go to obtain a version that will work?

John, Operation Systems Supported
AVG AntiVirus Free Edition 2015 is intended to protect workstations with the following operating systems:
Windows XP Home Edition SP2
Windows XP Professional SP2
Windows XP Professional x64 Edition SP1
Windows Vista (x86 and x64, all editions)
Windows 7 (x86 and x64, all editions)
Windows 8 (x32 and x64)
(and possibly higher service packs for specific operating systems)
AVG Guru

John, Operation Systems Supported
AVG AntiVirus Free Edition 2015 is intended to protect workstations with the following operating systems:
Windows XP Home Edition SP2
Windows XP Professional SP2
Windows XP Professional x64 Edition SP1
Windows Vista (x86 and x64, all editions)
Windows 7 (x86 and x64, all editions)
Windows 8 (x32 and x64)
(and possibly higher service packs for specific operating systems)
AVG Guru