I promise that i will compare the 3 knights,but a new knight has join them,so take a look
Installation:winner:avast!
mse, avira and avast run after installation,avg require reboot.avast is faster than avira which require the user to configure the application,mse require a genuine windows version
Graphical User Interface:
i dont know what to say all the programs have nice GUIs,enable you to reach main functions but i like orange more than blue and red."avast is nice,mse is simple,avira is object oriented avg offer you an upgrade to other products"
performance:(winner:avast,avira*)avast and avira have good performance you dont feel that you have anti virus"but avira dont provide protections and layers like avast",avg is moderate and mse will make you feel that you really have a very slow anti virus especially when you have folders full of .exe files
Scan Options:winner(avast,avira)
both programs allow you to configure the scanner in good way,avg allow you too but not in the depth like avast,mse dont allow you to control so much in the scan options
Features:
avast:offer a behavior blocker,network shield"NIPS",boot time scan,built in malware submission system
mse:spynet community,Dynamic Signature Service
avira:generic repair
avg:link scanner
malwaer cleaning:
in addition to the regular methods in cleaning
avast:boot time scan
avira:generic repair
avg:i could not find
mse:really good in removing leftovers from registry,and system files
lacks:nothing could be called complete and every thing has some lacks"we will take lacks as a lacks in an antivirus program not IS program"
avast:need to be more effective in disinfecting complex viruses,scan registry for malware related keys
avira:lacks web scanner,email scanner,some kind of proactive protection like"HIPS OR BEHAVIOR BLOCKER",gamer mode
avg:anti rootkit"real one",proactive protection
mse:if they merge the protection module that used in windows defender mse will be very very good,more complex options for advanced users,and good submission system,develop their updating system for the AV database
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conclusion:
as you can see avast provide better features for no cost.so what is the best for me?of course you know
if any thing wrong or biased point to it