I purchased a brand new HP probook laptop last year in July(2016), it was working fine and perfectly(I used it for 9 months without any error), 2 months ago,I was working on it, then suddenly I got notification "you must restart your computer to turn off user account control" and it restarted automatically, After restart, this screen starts appearing and I was unable to do any thing after this screen
This system is the property of Booz Allen Hamilton and may only be accessed by authorized users.
I contacted the shop owner(I have in-voice slip), he tried below things
1: Re-install windows 3-4 times
2: Re-install BIOS
But every time,this screen start appearing as soon as I connect to internet.
Finally, I claimed warranty and they replaced its motherboard, I was just using it gave me the same warning and restarted again, and after restarting, this screen starts appearing.
I tried contacting this company but no response from them.
Please suggest me what should I do?If the company is the owner of this pc,then how it worked till 9 months? Also what should I do to make it work again(or remove ownership of the company)
Is this a case of Ransomware?