Angels have the Phone Box
Mmmm....no. Actually, any infection that holds your computer hostage is a type of ransomware. Some encrypt while others don't. One ransomware sets the Windows System password which prevents you from booting into your operating system. That is also a type of ransomware. So, yes, the OP did indeed have a type of ransomware, holding his computer system hostage until he called the number to have it "fixed".
Glad to hear you got it sorted! I suspect you didn't check the box in Malwarebytes to scan for Rootkits, as it usually finds them when you do. No matter - TDSSKiller is a good tool as well! Cheers!
Last edited by simrick; 03 Jul 2016 at 18:46.