Add punctuation: Before msisadrvsys scanning make sure your PC no virus and trojan We recommend HitMalware
A: Before msisadrv.sys scanning, make sure your PC no virus and trojan. We recommend HitMalware.

Add punctuation: Finally I want to thank the Organization of the event for the invitation and attendees already without you or your interest and questions would not have been possible
A: Finally I want to thank the Organization of the event for the invitation, and attendees already without you, or your interest and questions would not have been possible.

Add punctuation: In recent years we have seen a lot of leakage that stems from the fact that a website has not been adequately protected
A:
In recent years, we have seen a lot of leakage that stems from the fact that a website has not been adequately protected.