microsoft acct

hello everyone
i have a question, i have 1 pc and a laptop at home that use my same microsoft hotmail acct login,i upgraded one pc to windows 10,the other is win 8.1,what i wanted to find out is if there would be any issues with using my same login on 2 separate devices.i do see the background as the same on both etc

No. you won't have any problems. I use mine on two machines. In fact if you log into your MS Account you can view your devices.

I can log into my account on my desktop. On my laptop under settings accounts Sign in with Microsoft account click on link it will turn gray for a sec then back to blue So I can not sign in for Contana speak to work.