Installing software many times.

Hi all.

Recently after hearing that a local PC clinic charges £50 just to format and install anti virus I thought that its not a bad business idea and begun doing some research. What I could not find out however is how do they do it legally.

How can they install a copy of windows and anti virus so many times knowing their total is way more than £50? Can anyone tell me about a non-****** solution?

I am aware that OEM versions along with a piece of hardwere are cheaper, but the ones I've seen are not cheep enough - £60+.
"Corporate" - is that the solution? Don't really understand it that much.

I will be very great full to anyone who helps me here. 10x and thanks in advance.

there are all kinds of deals out there. If they allow a confirmed "busy" tech to install it "free", they still benefit on renewals... as over 50% do re-sign and pay after the old one has expired.

true raybay. but people must be aware that, "free trials", arent always as free as they make out.

My answer responded to the question. I do not believe yours did, true though it may be.

My answer responded to the question. I do not believe yours did, true though it may be.
i know your answer did. but omitted the possibility of inviting adware etc.

So does anyone know the answer at all?