I recently tried to change my old hard drice in my Acer Aspire E 14, with a Kingston 240 GB SSD. I used Minitool partition Wizard to clone the old hard drive to the new SSD, but when I installed the SSD in the Aspire and turn on the power button, it says there is "No Bootable Device". I used a NEXSTAR dual Drive dock to clone the drive, but the sofware said I had to change the source drive from MBR to a GPT first. So now that I have the SSD cloned from the original HD, I changed it back to MBR. I Noticed there are three partitions. Which one needs to be set to active? How do I make the new SSD bootable? Any help would be appreciated. Thank you in advance.