From Panda:

After 7 months in beta testing, Panda Cloud Antivirus 1.0 FREE Edition is finally available. You can download it from

In version 1.0 we have improved most of the issues submitted during the testing period. Some of the improvements it incorporates are:

- Supports Windows Vista and Windows 7 64bits.

- Ability to restore any neutralized file.

- Improved detection & protection against rootkits.

- Free Technical Support forums.

Remember that Panda Cloud Antivirus 1.0 is 100% FREE for home users and non-profit organizations and schools. In adition, you can install it in multiple PCs.

So it's available in a 64-bit version now, which is nice (and necessary). I happen to prefer Microsoft Security Essentials, but I found Panda Cloud Antivirus to be effective and lightweight, which is pretty much all you can ask of a Windows AV product.