How can we be sure that a given personal system is free from malewares or ransomwares ?
For instance, malewarebytes claim that they can detect ransomwares, did you detect one with this tool ?
OK, I have a partly answer. The signatures are not displayed on virustotal. Nobody says how to make a diagnostic.
By the way, this topic should not be here, why did I decide to write this in that subforum?
The only correct way is - use a good browser (keep it updated all time). do not download unknown attachments from unknown sources. Do not download software from un-authorised sources. Use only genuine usb products. And the list may go on.... but the things i have mentioned should keep your device 99% safe
That's the best-practice behaviour. However, a lot of legit sites have ads which open windows with unwanted contents... And my real problem is detecting, when for instance a Win10 PC has a strange behavior, how can we know if it's the reason is the normal unwanted Windows telemetry or Windows software optimizer, or a malware using your PC as a slave for an unwanted goal.
If I want to help people administrating their computer, I should know how to detect this kind of intrusions.