Windows 8 usb boot missing operating system

You can read on to get error details or skip directly to solutions. To be specific, the causes that lead to Operating System Not Found are as follows. Note: If the BIOS fails to detect the operating system, you will receive one of the following error messages, which tells the same problem on different operating system versions.

After knowing the causes for an operating system not found or missing in Windows, now it's time to apply effective solutions to restore the missing operating system. This may solve OS not found error. You should contact your hard disk or computer manufacturer for a replacement as long as these devices are under warranty. You can try to set BIOS to default settings to solve the problem. Both wrong operation and virus infection can damage MBR, which locates in the first sector - usually sector 0 of the hard disk.

Thus, Windows will not boot. If you prefer an easier and safer way to rebuild or repair the MBR disk, you may apply third-party partition magic software - EaseUS Partition Master to perform an automatic repair. On top of that, some brands provide customers with inbuilt tools to deal with MBR issues. If the system partition or boot partition is not set to active, you may encounter the operating system not found issue. Step 1. Run EaseUS partition manager software.

I have changed my boot order and disabled secure boot. When I go in through the boot menu it now gives me the message: missing operating system. Please help! This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question 2. Report abuse. Details required :. The reasons for these errors are hard drive is corrupted, Boot record is corrupted, BIOs did not detect hard disk, missing or corrupted command. Click the key when you are asked to to boot from DVD.

Then choose "Repair your computer", not "Install now", remember this. Select the operating system after the installer searches for Windows installation, and click "Next". Then click "Startup Repair". It will automatically fix problems that are preventing Windows from starting. If all these are not helpful, your operating system must have been damaged deadly, and you have to take the last one to reinstall your Windows and Office.

SystemBuilder SystemBuilder 1 1 1 gold badge 1 1 silver badge 1 1 bronze badge. I used unetbootin but exactly the same thing happened. Anyway, what do you mean, msy? I haven't done anything like that. Are you sayin I should download another Linux distro? Add a comment. Active Oldest Votes. You shuold take an eye on these things: Don't connect other disk to your computer.

Don't use unreliable tools. Don't download incomplete system files. Improve this answer. Try using etcher : and make your own bootable ubuntu flash disk in 3 easy steps Just realized this was bumped from