Screen going black instead of getting the window CHOOSE YOUR OPERATING SYSTEM

[J Shyam]

my laptop was multibooted with windows 10 preview and windows 7..after 1st restart everythng was normal..but from the next restart my laptop screen is going black instead of showing the window CHOOSE YOUR OPERATING SYSTEM..i can see only the mouse pointer..but by seeig from the 1st restart , i knew that topmost and default option was windows 10 and the lower option was windows 7...with that in mind, i clicked the topmost place where i used to see the option as windows 10 and then it loaded just like normal, next time i clicked the lowermost option and it started the windows 7..the problem is that i am getting black screen that i am invisible to the option of chooing the operating system..i is now in a condition that i have to click without seeing anything on the screen, but just by imagining.

 

[Elizabeth Anderson]

Hi,
Follow the below steps -
Remove the battery after unplugging the laptop.
Hold the power button maybe to 30 seconds or 2 minutes.
Put the battery back in the laptop and restart it.

If this doesn't help then please reply.