I had Avast for 4 years without any trouble.But,slowly,they became more and more aggressive about upgrading,registering.Shortly after registration,I've noticed number of spam messages increased to my email.This is quite simple math.Avast asks for your email,and shortly after spam messages number increases.The last drop about Avast was their latest update.The damn thing crashed my pc 7-seven-times after my attempts to find out what was the reason.Finally,I uninstalled Avast and my pc seems ok.
Then I installed Panda.It severely slowed down my pc.Unninstalled Panda.
Tried AVG.It is a bloatware.Uninstalled.
Tried Microsoft Security Essentials.It is a joke.Uninstalled.
Tried Bitdefender.I don't like black presentation.Very aggressive in asking money.Uninstalled.
Tried Kaspersky for trial.An trojan slipped by Kaspersky.Uninstalled.
Then I spent about 5-6 hours searching for best antivirus.The biggest help I found right here,on this site.Very good forum indeed.It turned out that Qihoo is big thing in China,with about half a billion users!!
Next,I found Qihoo ranked very high on AV tests and few other similar sites.To my pleasant surprise,Qihoo is free and gives total or premium protection!!There is no paid upgrade!!You get the best version for free !!Isn't that nice and refreshing,after seeing how everybody try to sell better protection.
Best of all,Qihoo doesn't ask for registration.Meaning,unlike Avast, Panda and about everybody else,Qihoo doesn't ask for your email,and later doesn't sell emails to third parties!!
I have Qihoo now for 6 months.
Immediately after installation,Qihoo found 5 software patches and installed it.And Qihoo continues to do the same,update self automatically,has Avira and Bitdefender antivirus engines incorporated.Also,today I was very pleased ,cos Qihoo alerted me to possible trojan,and offered suspicious site be checked with virus total!! I accepted and within 3 seconds,trojan was detected and removed!!
I am very pleased with Qihoo!!
Of course,Qihoo is not the only layer of protection on my pc. Many years ago,when I got my pc,shortly after internet gave to my pc an virus.While my pc was at repair shop,I felt like an family member is sick.
Since then I spent many hours educating myself about viruses,trojans etc.