With the release of AVG 2011, there have been numerous complaints about issues and conflicts with other security tools like Malwarebytes' Anti-Malware. Unlike previous versions, AVG 2011 cannot be effectively disabled
to prevent it from interfering with other security tools...after restarting the computer, AVG re-enables all protections. Read these related discussions:
There have been reports of issues with the computer starting properly on 64-bit Windows sytems
for which AVG has had to release these fix instructions
There have also been reported problems with computers after using
new features like PC Analyzer
and PC Tuneup
which purport to fix registry errors in order to make the system more stable and various optimizing tools which can make changes to system settings.I do not recommend the routine use of registry cleaners/optimizers
as they are extremely powerful applications that can damage the Windows registry
by using aggressive cleaning routines and cause your computer to become unbootable. Using registry cleaning tools unnecessarily
could lead to disastrous effects on your operating system such as preventing it from booting properly. For routine use, the benefits to your computer are negligible while the potential risks
Even MajorGeeks, a popular download hosting site, has issued a Statement on AVG Free 2011
and has removed its Editor's Pick listing.
For these reasons, I no longer recommend AVG as a free alternative.