- To start Windows 7 from an installation disc or USB flash drive.
- Turn on your computer, insert the Windows 7 installation disc or USB flash drive.
- And then turn off your computer. Press any key when prompted to do so, and then follow any instructions that appear.https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwj95aXF8NjLAhXOSo4KHSDJBP0QFggdMAE&url=http%3A%2F%2Fwindows.microsoft.com%2Fen-in%2Fwindows7%2Fstart-your-computer-from-a-windows-7-installation-disc-or-usb-flash-drive&usg=AFQjCNFPbnuh9hPWP3L-BrN9T2mY9l3ZWQ&sig2=XtfhKYRQ-qUabzdYEh5kng&bvm=bv.117604692,d.c2E