My computer like a few came with MSO pre-installed. I didn't mind the initial legit check (I still have the licence key) and subsequent download of updates. It's when a few months later it asked, nay, demanded to check again. Later I opened a document and it asked again, and again, and again so on and so forth. An e-mail natter back and forth with someone whose spelling could be better at Microsoft help got me nowhere. "Have you entered the correct licence key?" "Have you un-installed and re-installed, then re-entered the licence key?"
There must be something better I thought. So I gave Open Office a try. A free office program? It must be a bit naff, full of bugs I thought. Well I was surprised, I've had no problems with it and it covers all my needs. I haven't looked back since.