AVG-Antivirus by Grisoft is one of the best antivirus software when it comes to performance and its free version holds the record for one of the most downloaded files on the internet. Overall AVG-Antivirus is an all in one package which makes it one of the best and most effective virus scanners. Though there are some hick-ups like slowdowns but if you ignore it this software is quiet a good performer. This is user friendly software having support for Windows Vista and the 64 bit versions of Windows XP and Vista.

When tested AVG-Antispyware easily detects adware and spyware but leaves only the Banbra Trojan horse, which attempts to collect online-banking credentials. Apart from this it easily recognized inactive adware, keyloggers, bank-related spyware programs and rootkits. But it failed to detect additions to HKLM Run keys, changes to the default Internet Explorer Start and Search pages, and alterations of our test system's Hosts file.

AVG Anti-Spyware is easy to use, with self-explanatory icons clearly marked at the top of the main interface window and with one-click buttons. On the downside, it lacks several features such as antiphishing protection to prevent a user from going to known fake financial Web sites. If you opt for AVG Anti-Spyware, consider purchasing it through a third-party U.S. distributor that offers phone support.