Just off the phone with these guys - they pretend to be from Microsoft.
They ran the Tree Command and claimed I had Hackers + Zeus Virus on my VM.
The Scammer tried to charge me $1100 for fake services.
He got really angry when I confronted him and was going for Syskey but I stopped him in his tracks. Started writing Hindi swear words in the chat box and got really annoyed.
Ask for Bob when calling I wound him up and he's fuming - claims he is a Microsoft Certified Engineer - a very noisy call centre also.
Here is their number and website: 888-614-0555 (US) 0800-098-8569 (UK) - Tested and worked with Skype
They use GoToAssist also.
Have a good one!