Is there a free Anti-Virus software for Windows XP 64-bit?
Sophos 6.x supports 64-bit Windows XP, but according to Bruin Online, the earliest it will become available as a download/update is Spring 2007. Campus users still need to upgrade from Sophos 4.x to Sophos 5.x before UCLA releases Sophos 6.×.
During this transitional phase, 64-bit Windows users can try the personal version of AVAST Anti-Virus Software. Though I haven’t tried it, many of my colleagues really like this product.
Visit AVAST for more information.