|There was a computer which was not previously connected to the network since out had viruses n it's network drivers weren't there,someone fixed the drivers issue n connected it to the net since then the issue started|
I would suggest you first disconnect that computer from the network. Then sweep other computers within your environment for viruses/malware. If the virus is a network virus it can be jumping around all the computers within your network.
I would suggest you scan for viruses using an online antivirus scanner (trend micro comes to mind) and also, download and run malwarebytes on them too.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.