I had a computer that was hooked up to the internet for 5 years without a security package and I used daily with no problems then a virus,malware something got in and wrecked havoc. It took a week of lost time and lots of destroyed valuable(to me) data before I was even able to use it. I put a security package on it which took 30 min. or so, it was free, easy to install and came with tools to help me see more details about the system. I used Comodo but I tried a few others and they were just as good it seems but it was easiest for me at the time, I haven't put it on my new computer yet since there is not much to protect on it.
The Administrator problem has bugged me I make someone an administrator and they need an administrator to do things then I look at their status and they have been demoted by the system to a user. What gives?
I moved the slider to the bottom that allowed any program to run without notifying me and any changes made by me to go thru without notify me and when I went to User Accounts and looked at the detail I was still an Administrator, the system had not made me a User again!