A pop-up blocker will not help you, because you are infected with adware/viruses.
#1 Download MalwareBytes Anti-Malware (free version):
https://www.malwarebytes.org/antimalware/
#2 Download RKill (free):
http://www.bleepingcomputer.com/download/rkill/
#3 Download Sophos Anti-Rootkit (trial version):
https://secure2.sophos.com/en-us/products/free-tools/sophos-anti-rootkit/download.aspx
Restart your computer and press F8 before the Windows screen comes up to bring up the boot menu. Select “Safe Mode with Networking Support”.
When Windows starts up, run RKill first, this will stop any virus/malware processes that managed to start up in Safe Mode. Next, run MalwareBytes scan and remove anything that it finds. Then, run Sophos Anti-Rootkit to make sure that the bad stuff doesn’t just reinstall itself when you reboot.
95% of the time, that should fix your problems. If not, report back and we can try some other stuff.
or you can install linux of mac os and get rid of 99% of the problem without having to be a sysadim