Consider a patch management solution
If you have a security problem, I think that you should consider using a patch management solution; you can find a program on the internet that you can download that will assess your network or computer security situation, find known weak spots or holes, download the patches to fix the problem, and automatically apply them. You can even get a patch management program that will run itself on a regular basis so that you do not have to even remember to open it and run it periodically. To find out more in your options in regards to a patch management program that can work for you, all you have to do is search around the web with your favorite search engine page with some terms like "patch management app small network" and see what comes up; I bet you get some good info in next to no time!