sanjoa Posted March 22, 2016 Share Posted March 22, 2016 As you see on the picture above, I can't boot my computer. I'm on Windows 7 x64 ultimate OS installed on a 4TB HDD. What should I do? Link to comment Share on other sites More sharing options...
Ghazi Posted March 22, 2016 Share Posted March 22, 2016 You boot device like hard disk is not found. Go to the BIOS and look if its detected or not. If you have a bootable windows dvd or a bootable usb try to boot from it. Link to comment Share on other sites More sharing options...
kasper Posted March 22, 2016 Share Posted March 22, 2016 hi, do you do some changes in Bios ? you turned something I do not like Windows 7 for example SecureBoot Link to comment Share on other sites More sharing options...
Dodel Posted March 22, 2016 Share Posted March 22, 2016 Disable secure boot in the bios, switch to legacy mode again in the bios, and ensure your set to boot from HD first not external / usb. Link to comment Share on other sites More sharing options...
sanjoa Posted March 22, 2016 Author Share Posted March 22, 2016 My OS is installed on GPT table because Windows 7 does not support 4TB hdds... disabling UEFI did not work Link to comment Share on other sites More sharing options...
jabrwky Posted March 22, 2016 Share Posted March 22, 2016 Perplexing indeed. https://www.youtube.com/watch?v=n9rNv7xOrKg I used AOMEI Partition Assistant to convert boot MBR to GPT. Had installed Win7 in legacy boot, and wanted to change to UEFI. Some manufacturers offer a tool for making Windows systems recognize the full capacity of the drive. Was the system already working before this happened? Link to comment Share on other sites More sharing options...
Jordan Posted March 23, 2016 Share Posted March 23, 2016 12 hours ago, sanjoa said: My OS is installed on GPT table because Windows 7 does not support 4TB hdds... disabling UEFI did not work IMHO. i think you have to reconsider all your config! i mean why installing Windows on a 4TB hdd? Better install it on a sdd or at least on a regular hard disk and keep the 4TB disk for the archives/backups/work/personal.... Link to comment Share on other sites More sharing options...
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