Is this a virus or not! If it is, how do I remove it?

Ok today I opended up my PC ( Window 7, and my screen some weird FBI thing popped up on my screen., I can't open internet explorer, I can't open anything. I tried to search up on my iphone what could possiable be, the conclusion was that this was a virus, I wasn't 100% sure

Some details are

Name: The FBI Federal Bureau of Investigation

It says I had a child porography in my files.

It says I have to pay in 72 hours or my files will be " detained "

FYI, I'm not a computer expert.

Is Juvy and Jail the same thing?

My name is Alexandra(Alex)
I'm a 15 year old outlaw and have been arrested 5 times and been to court 4 times and sent to a girl's Juvy. 3 times robby, 2 times driving too young and speeding and 3 times sued and 2 times I tryed to escape. Every times been the same in the cells ecsept for my phone and my parants. The people/friends, cell, Juvy, prisoner's clothing have been the same. But if I break the law again (I know I will) in 4 years will Jail/Prison be the same as Juvy. I hope so because Juvy is just like the real world without my iPhone.

IMessage not working on iPhone 4?

For the last week or so my iMessage just won't work despite my having full Internet connection and mobile Internet. I'm on iOS 5.1 (never updated because I can't afford the amount of memory it takes up)
Internet and all other services are working fine?

My iPhone 4 will not receive messages, what do I do?

Just the other day my iPhone 4 stopped showing that I was receiving messages. I tapped on my "Messages" icon and the message that they have sent would be there, but it was like I opened it when I hadn't yet. Then it got worse… I would tap on the message that my phone thought I had read but hadn't, and most of our conversation from the past couple days would just be gone. I can still send messages out though and they are received.
I'm up to date on the latest software, but Every couple of minutes I get a message that pops up and says "Storage Almost Full… You can manage your storage in Settings," so I did. I have full memory in iCloud and I have 7.3G and 6.4GB used. All of my Apps are deleted and I don't have that many songs and pictures on my phone. As for messages, I have them dated back to 2011 just because I never delete them. So I decided I would finally delete them and they kept popping back up when I deleted them. So weird.
I backed up my phone, and rebooted it through iTunes, and what do you know? It still is doing the same thing. Thank you for getting this far and if you have any ideas to what I should do it would be so appreciated.

My iphone rebooting over and over?

My iphne has been reboting itself. Its on for a few minutes but it just boots it self again. I tried every method but non of them work. I need the method for iphone 3g ios 6

Is it possible for me to get Snapchat?

I have a Blackberry Curve 9360 and I'm feeling so left out from all of my friends. I can't get anything on my phone, no snapchat, instagram, tumblr, facetime… I really would like snapchat, is there anyway that it can be downloaded to my phone? Please don't tell me to buy an iphone, I'm in my contract until next January and I can't afford to buy an iphone.

Where the iphone 3GS touch screen original spare part available in India?

My iphone 3gs touch screen was broken. I was tried to contact iPhone authorized center people.
they told to me apple company doesn't supply spare of iPhone warranty over phone and they were suggested try to 3rd party spares. I spent around Rs.1500 for touch screen but not working properly.
what i do now. Why apple company didnot supply spare parts. Actually that phone bought used mobile store at Singapore. Any one Help me. What i do.