ONE tip I will give, and that has never let me down!
Go to
www.grc.com and click on 'Shields Up' it will tell you if your computer is open to possible 'attack' or not. But DO get the Microsoft patches first. Just go to Windows Update. Not necessary for a few operating systems so check.
While you are there you may find other things you can use and this Guy Steve really does know what he is talking about. The FBI use him as do the CIA and he been known to assist the Met Police.
So, for what it's worth, and it is good, go get it is my advice.