Definitions may need to be manually downloaded and applied for it to work again.
Some internet connections are less stable than others and can cause the definition package to be corrupted during the download.
The Quick Heal Virus Definitions 64-bit allows manual update of your Qucik Heal Antvirus Pro, Quick Heal Internet Security and Quick Heal Tootal Security in case that you do not have internet connection or in case auto update fails.
I'm happy to say that Quick Heal Anti Virus Pro 17 is much better than the version I reviewed nearly two years ago. sir I have viruses in my system , for that whenver I am going to install quick heal anti virus , its shows that viruses are in my computer .its asking for cleaning the system , but it can't clean the system as it is n't updated . If your list included Baidu, Qihoo 360, or Quick Heal, you're probably in China or India.These vendors are huge in Asia but much less famous in the west.