You are such an idiot, why not just answer something normally?
@ thread starter, I just went through EXACTLY the same thing on this computer.
So what I did was:
Started up the comp and as soon as it came on it right clicked the task bar and hit "Task Manager">"Processes" then stop/end anything you didn't start yourself/you don't normally start.
That should then allow internet to be used and allow things to be downloaded/installed. I then reset all my internet explorer settings.
I googled/youtubed the best ways to get rid of trojans and shit and downloaded two of the best sounding ones*.
I then ran a full scan on each then a quick scan on each and quarantined/deleted anything that was a thread.
* 1)Malwarebytes' Anti-Malware, 2) Emsisoft Anti-Malware.
Computer is now running fine and I didn't lose anything.
Gimme a shout if you need anything else 'cause as I said, I JUST had this happen to me.
EDIT: I already had AVG Anti-Virus, it's good, I reccomend,