Spyware/Adware 

What is Spyware/Adware?
Spyware and Adware are software programs that have been installed on your computer by a remote site. Many free utilities that you download from the Internet will install hidden software that sends details of the websites you visit and other information from your computer (which can include your email address) to advertisers so they can target you with popup ads and spam. Additionally, spyware/adware software is often poorly programmed, containing bugs that can cause other files on your computer to be corrupted.

Preventing Spyware and Adware
Keeping your antivirus updated is the first step in preventing a spyware infection. If you are already infected, if you believe that you might have a spyware infection, we recommend using Malwarebytes' Anti-Malware. You can download a free copy from download.com by clicking here.