Virus prevents antivirus updating
By comparison, running a more thorough scan will take longer; our reviews list the amount of time a full scan takes to run on a freshly installed Windows 7 system with two 2.1GHz cores and 8GB of RAM.
We use the following data sources and tests to come up with our scores: • AV-TEST: A well-respected organisation that tests every major AV firm to their absolute limits.
By default, most AV programs run an optimised scan that checks the files most likely to have been compromised.
And with so many decent free options available, the choices have never been wider.
Here, we look at Windows 10’s built-in Defender and three of the best alternatives.
A number of other options are greyed out, prompting you to buy one of Kaspersky’s paid-for anti-malware suites.
While Kaspersky Free is light on features compared to its commercial counterparts, it provides a few extra features in addition to the powerful, proven antivirus engine.