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Jegajothy vythilingamFlag for United States of America

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Computer virus security

My OS is win 7 Prof 64 bit and I had McAfee total security.  But a recent attack on my pc where a hacker was able to take control of my IE and hold me for ransom, and finally the experts in this Forum were able to suggest the solution to bring my pc to normalacy.  
I downloaded Kaspersky Pure 3.0, the free version, hoping to replace this with mcAfee, but it is the free version at the moment.
My Q is whether the free version of Kaspersky will do a better job than McAfee, since in order to install Kaspersky I had to uninstall McAfee completely, and I am now left with Kaspersky with the only anti virus program.  
My License with McAfee is still valid and I can reinstall everything back again, but it may need to uninstall  Kaspersky.
As I am completely lost, hope the Experts and Gurus could please suggest the best route to take.  
I am also exploring of having a protected DNS router using one of the paid services and also use the openDNS.org solution meanwhile.  
Thank u.
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thank u everyone
If you are disciplined enough to only use your protected space when interacting on the Internet, and with downloads, then I would argue that you do *not* need to have a signature-based scanner present on your system.

totally agree. that's what i do, and my computers don't have any anti-virus software.

also testing things in VM is a good practice. a VM wih snapshots allows you to quickly restore the test environment with no need to worry about any possible malware infection.