Kaspersky is a good antivirus. It has easy to use interface and has all the functions and features to keep your computer safe. Its very easy to install and use.
It easily finds and disinfects all types of trojan horse, malwares etc. You can safely browse the internet without having to worry about security of your computer. It protects from all types of virus. But the problem with this, is it consumes a lot of RAM and therefore slows down the computer. It takes multiple hours to conplete full computer scan. While scanning is turned on, you can not use the computer, almost all application hangs while scanning.
Thats the main problem with Kaspersky.
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