It is a common experience to be stuck in a certain stage during computer startup.
You may see an issue notification on the computer screen, such as Operating system not found.
How do you recover files from a dead computer and fix a computer error?
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ThisMiniToolpost will walk you through the guide.
And after that, I will also provide 6 solutions to help fix no operatingsystem error.
Now, lets take a closer look at how to recover files when Windows crashes.

Here we take a USB drive as an example.
Step 3: Click theBootable Mediabutton at the top menu bar to jump to the bootable recovery interface.
You should get a full edition that contains Bootable Media Builder.

Then, you might choose theBootable Mediaoption to create a bootable disk.
Step 2: Restart the computer and pressF2toenter the BIOSsettings.
Step 4: PressF10to exit and save the change, then hitEnterto confirm.

Step 5: your system will restart automatically.
You should wait patiently until MiniTool Power Data Recovery launches by itself.
Find a partition that contains your crucial files and tap on theScanbutton.

Step 7: Browse the files list on the result page to choose the needed files.
Since the computer cant start up, you should save files to the external equipment.
This is all about how to recover files from a dead computer.

you’re free to read the following six solutions to find the most suitable fix for your case.
Check Problems via BIOS
1.
Power on your system and boot it into BIOS options.

Find and selectPrimary Hard Drive Self Teston the BIOS menu by using the arrow keys.
ClickEnterto start the test.
Check Problems with MiniTool Partition Wizard
1.

Download and installMiniTool Partition Wizardon a working computer.
Use this tool to create a bootable media, then connect thiscreated bootable mediato the problematic computer.
Wait for the software to launch automatically.
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- pick the disk and choose theSurface Testoption on the left pane.
ClickStart Nowto begin the disk surface test.
#2 Check Whether the Boot Partition Is Active
What is ahard disk active partition?

On each hard drive, there is at most one active partition.
When you set the wrong partition active, you will not be able to get into the computer.
Using the MiniTool Partition Wizard to activate the partition is simpler.

You should create a bootable disk with the steps in method 1.
Then boot your box with this bootable media and wait to enter this software.
Afterward, choose the partition you gotta set as active and selectSet Activeon the left pane.
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Then, the master boot code will search for the active &primary partitionon the hard disk.
- snag the disk that suffers MBR damage and clickRebuild MBRfrom the left pane.
When the process is finished, hit theApplybutton to complete the suspending process.
Then, go to check whether the hard disk is detected.
you could read this article to learn how to solve when theboot drive not showing up in BIOS.
you’re able to easily fix this problem by changing the boot order.
After the reinstallation of the operating system, all problems and errors will go away.
The only thing you should notice is all the data on the hard drive may be erased.
But you’re free to stillrecover files after reinstalling Windowswith the recommended powerful bootable recovery tool.
How to reinstall Windows 11 without losing data in case the PC system goes wrong?
This post shows you three efficient ways to do this task and have a try.
Hope you’re able to fix the problem successfully.
hey feel free to contact us to share your problems with MiniTool software via[email protected].