Oh yes, because when the FBI is trying to get pedophiles, they send them nice convenient warnings online first so that they can start destroying evidence instead of just getting a warrant knocking down their door to arrest them before they have the chance to destroy evidence.
Dude, you have a virus, a trojan, a worm, or maybe a few different ones because you've been on porn sites, and those things are jam-packed with malware.
Could have also come from torrents.
You want to look at naked girls, well you have to expect that your going to get some program on your machine that's designed to trick you into giving away personal information and/or money.
BTW, don't be looking at your bank information with that machine. You're infected with something.
Best thing for you to do is try and clean it, back up what you don't want to lose and then do a full reset back to the factory image
And then after installing and updating, create an image backup on your system. Windows 7 and 8 can do this, and you can also buy programs to do it.
Just remember you want to make a full image backup that you can restore from a boot disk.
And simply be prepared to have to do that every few months because you want to keep looking at naked girls.