my Acer Aspire V5 431 cant boot up.. i think tis disk has been fully clean.. and i cant even use my win7 installation DVD to boot up.. it always display, "BOOTMGR missing. someone help me
When powering up the laptop with the disk in the drive, press the F-key that corresponds to "Select Boot drive" when it asks for it. Then select the dvd drive. If your laptop has a graphical UEFI bios then select the UEFI DVD drive instead. How it shows up varies with the motherbd being used so we cant get more specific.