7. You see in your browser a lot more ads than ever before

If your browser window is cluttered with ads which didn’t seem to be there last time you visited the website, it may be that you installed a malicious extension, or a malicious software is acting as a web proxy for your computer.

Make a full system scan with your antivirus (which you already installed, hopefully) and then have a look in Programs and Features to see any kind of strange programs there.
It mustn’t necessarily be an extension in the browser, it can be a program that is acting as a proxy and reinterprets everything what you browse and injects ads.
The cybercriminals are gaining money either by every click or even by every view of the ad.

Also an anti ads extension like AdBlock or AdBlockPlus might help but you need first to solve the root cause.

 

Did this ever happen to you?

All these and many more topics are in the free eBook "Improve your security" available here: www.improve-your-security.org.