Making your own security system isn’t too hard. If you’d like one that is cheap and simple, Instructables user deba168 shows how to make a wireless motion detector with an Arduino.
If you use Google Drive to collaborate as often as we do around here, you probably don’t have time to go back and clean up permissions or old files when you’re through with them. WhoHasAccess is a web app that shows you all of the people and permissions you’ve granted so you can tighten up your security.
A recent test done by the independent antivirus research group AV-TEST — whose tests we’ve mentioned in the past — took a look at the performance of today’s most popular malware-removal applications. Most of the applications performed well, but only Malwarebytes — a free download — managed a perfect score.