I installed windows 10 on a toshiba with win 7 and now when I press the start boutton it only goes as far as the black screen with the toshiba logo and leading inovation with 3 arrows to the right please help!!!
While this is from Dell, it should still work for you. There are many options listed for fixing this problem. Sadly there are a lot of problems with 10 installs. Rather than me telling you to try this or that one at a time, try this link. http/www.dell.com/support/article/us/en/04/SLN297926
Sounds like your device either didn't like the installation of 10 or isn't accepting the installation of 10. I would try uninstalling it, going back to 7 and see if that resolves your issue.
While this is from Dell, it should still work for you. There are many options listed for fixing this problem. Sadly there are a lot of problems with 10 installs. Rather than me telling you to try this or that one at a time, try this link. http/www.dell.com/support/article/us/en/04/SLN297926