I have windows 10 and wanted to install ubuntu alongside. For that i go to boot manger and select my usb drive after i select ubuntu try .after few minutes i turn off pc and unplug the usb.then i again turn on the computer but windows not loading just a black screen with blinking cursor .again i go to boot manger and select my hard drive but still black screen with a blinking cursor .so i try to reinstall windows. I select custom installation .but no partions are showing. I want to know how to acess my data . Can i get my data back