The lights flickered, the power went out, and now the computer restarts over and over without reaching the desktop. A Windows 10 boot loop after power outage is a common result YYPAUS of losing power while the system was running or updating.
When power disappears suddenly, files that were being written may be left half-finished. If those files are needed during startup, Windows fails, restarts, and fails again.
A sudden surge when power returns can also upset hardware, so it is worth checking both the software and the electrical side.
In most cases, the built-in recovery tools are enough to break the loop without losing files.
What Might Be Causing It
A loop after a power cut usually comes from one of these:
- System or boot files were damaged while being written.
- The drive’s file system has errors from the interrupted writes.
- An update was installing when the power failed.
- The power supply or another component was affected by a surge.
If the PC shows no signs of life at all, rather than looping, a hardware problem is more likely.
First Steps to Try
Start with a clean power reset.
- Switch the PC off at the wall and unplug it for at least a minute.
- Disconnect USB drives, printers, and other accessories.
- Plug the PC directly into a wall socket rather than a damaged power strip.
- Hold the power button for 30 seconds while unplugged to drain leftover charge.
- Reconnect and start the PC.
If Windows still loops, it should open the recovery environment after two or three failed starts. If not, force it off at the logo three times in a row.
If the Problem Continues
Use the recovery menu to repair startup.
- Choose Troubleshoot > Advanced options > Startup Repair and let it run.
- If that fails, open Advanced options > Command Prompt and run chkdsk C: /f to repair file system errors.
- Try Advanced options > System Restore and choose a point from before the outage.
- If an update was installing, choose Advanced options > Uninstall Updates and remove the latest one.
- Restart and see whether Windows loads.
If the drive letter in the recovery environment is not C, run dir C: and dir D: to find the drive containing the Windows folder.
Protect Your Data First
Once you can reach Safe Mode or the desktop, back up your files before doing anything else, since power cuts can weaken drives. If the PC smells of burning or the power supply makes clicking or buzzing sounds, unplug it and have it checked. A surge protector or UPS helps prevent repeats.
The Bottom Line
A boot loop after a power cut is usually damaged startup files or file system errors. A full power reset, Startup Repair, and a disk check fix most cases. Protecting the PC from future outages is worthwhile, especially in areas with unstable electricity.
