Strange...

Probably a virus. Have you done any downloading lately?

 

sounds like you have some adware, check for anything that could have been installed automatically in the past few days.

 

Seems like a malware... Might want to work on getting rid of it.

 

do a system restore from a early point, it wil lshow you what files will be removed. That file is most likely the virus. then follow through with the system restore, or manually remove the virus and its other components

 

Go to ESET.com to download a great antiviral. ESET is way better than Norton or McAfee. It'll cost some coin but it is worth it.

It's the preferred antiviral of Evil.

Good Luck!

 

Try looking at all of your installed programs. Then, uninstall all unwanted programs and such. It saves space and it might even get rid of your problem.

 

Get MalwareBytes and obliterate that virus.

 

Better, do like i did.
Reset your computer back to factory.

 

Sounds like you need to make an appointment with Dr. YinScape.

 

Have you been downloading mods lately? Anyway, get an anti-malware software, or, as Mokolee described it as, obliterate it yourself. If you want to know how, pm me... Or Google, whichever is best for you.

 

Probably a malware virus. Try using anti software programs and that should do the trick. Here: This should do the trick.
http://www.webroot.com/us/en/home/s...sEJ5HH0UkqDeOv6J-elX-vyx0yBPp4eI74aAv7P8P8HAQ

 

Everyone... Please speak human.

 

http://www.howtogeek.com/126911/what-to-do-if-you-get-a-virus-on-your-computer/ If you read this, it will show you step by step on how to get rid of a virus.

 

I also have this when I use internet explorer and firefox :/ Its annoying as hell.My hint is to change your browser,worked for me. I now use Google chrome and everything is fine.Hope your problems gets fixed!

 

Seems like malware to me.