I had Windows 10.but l install Linux.the computer now started Linux automatically.how will.i start window

[Sanjoykhawas]

[don't post your personal info]

 

[Petrossa]

You will have to reinstall Windows again.
By installing Linux, you, at best, have overwritten the Windows Boot Loader and at worst have killed the entire Windows partition (if you did not read the install guide carefully enough when it came to selecting a partition for the Linux install.