I have an old laptop with vista on but wanted to change to windows 7 so could add my golf SIM, went onto you tube and one guy said split your c drive into two then make the new one active so I did this, then when I restarted it comes up bootmgr missing, I presume it's trying to boot from the one I split and made active, I'm not good with these things, sorry for the long post.
Steve
Steve