Thanks for the info there guys.
Soundy, you've hit the nail on the head there - large business but doesn't want to spend much money. Am going to have to approach the management team & advise the bad news with what they are wanting.
Will tell them to just reinstall Windows on the machine that is playing up as a bandaid solution & then advise a budget required to go to full IP setup. We have ample hardware to build decent machines for the job.
Am new to this stuff so I'm sure will have some more questions shortly.
Thanks again!!