The update ran overnight, and now the machine won't get past the spinning dots. Or it's parked at "Undoing changes made to your computer", or it boots straight to a blue screen headed Automatic Repair. Different screens, same situation — an update went wrong partway, and now you're locked out of your own computer.
Before you press anything, the part that matters most: your files are almost certainly fine. An update rewrites Windows system files — the plumbing that starts the machine — and doesn't touch your documents or photos. Every step below except the last two leaves them exactly where they are, and you'll get a warning before those.
First, work out whether it's stuck or still going
A monthly quality update usually finishes in minutes. A feature update — the big version upgrade — can legitimately sit at one percentage for a long stretch while it does real work, especially on an older hard drive. Cutting the power during that work is how a slow update becomes a broken one.
- Still working: the percentage creeps upward now and then, or the drive light (if you have one) keeps flickering. Walk away for a couple of hours; an update that finishes late costs you nothing.
- Actually stuck or looping: the same number for over an hour with no disk noise, or restarts that come back to the same percentage again and again. That's a loop, not progress.
Two quick detours. If the computer shows no sign of life at all — no lights, no fan — that isn't an update problem; work through the dead-computer guide. If it crashes to a screen naming an error code, start with the blue screen guide.
What the automatic repair loop is actually doing
When a start fails twice in a row, Windows stops trying to boot normally and runs a diagnostic instead — that's "Preparing Automatic Repair" and "Diagnosing your PC". Its main job is to roll the failed update back on its own; two or three restarts during the process is normal. Let it run.
Either you land back on your desktop — pause updates in Settings for a week or two and get on with your life — or you get "Automatic Repair couldn't repair your PC" with an Advanced options button. That button opens the Windows recovery environment, which is where every fix below lives.
Forcing the recovery menu with three interruptions
If the loop never offers that screen, there's a deliberate back door — modern computers boot too fast for the old F8 key, so Windows watches for three failed starts in a row instead.
- Press the power button to start the machine.
- The moment the Windows logo or spinning dots appear, hold the power button down until everything switches off — about ten seconds.
- Do that twice more. On the third start, the machine runs "Preparing Automatic Repair" and lands on a blue "Choose an option" screen.
Hard-powering a broken computer feels wrong, but during the logo screen Windows is only reading, not writing — the interruptions are how it knows to offer help.
Uninstall the update that caused this
This is the fix that works most often. From the blue menu: Troubleshoot, Advanced options, Uninstall Updates. There are two choices, and the difference matters:
- Uninstall latest quality update — removes the most recent monthly patch. Try this first; it's almost always the thing that installed last night.
- Uninstall latest feature update — rolls back a whole version upgrade. Slower, and only relevant if the trouble began right after one of the big annual upgrades.
You may be asked for your password, and on an encrypted machine for the BitLocker recovery key — it sits in your Microsoft account, retrievable from your phone.
When the machine comes back, open Settings, then Windows Update, and pause updates for a couple of weeks — otherwise Windows will helpfully reinstall the same patch tonight.
Safe Mode, and what to do once you're in
Some repairs are easier from inside Windows, even a stripped-down version. From the same blue menu: Troubleshoot, Advanced options, Startup Settings, Restart — then press 4 for Safe Mode, or 5 for Safe Mode with networking.
Safe Mode starts Windows with the bare minimum of drivers, so if the machine runs fine there, the installation underneath is healthy. From here you can uninstall the update the friendlier way — Settings, Windows Update, Update history, Uninstall updates — or remove a driver the update replaced. While you're in, copy anything irreplaceable onto a USB drive — cheap insurance against everything further down this page.
System Restore, if it was ever turned on
Windows normally sets a restore point before an update — but only if System Restore is on, and on many machines it ships switched off. Treat it as a free lottery ticket rather than a plan. Advanced options, System Restore, pick the point dated just before the update. It rewinds system files and settings and leaves personal files alone. If the list is empty, you've lost nothing by looking.
Startup Repair — one run, not three
Startup Repair, on the same menu, fixes one narrow class of problem: damage to the boot configuration, the small record that tells the machine where Windows lives. When an interrupted update has mangled that record, it finishes in minutes and feels like magic. For anything else it spins for a long while, then reports it couldn't repair your PC. Run it once — a second identical run produces a second identical answer.
Get the files off before anything drastic
The remaining options can't be taken back, so the rule comes first: never take a destructive step on a drive holding the only copy of anything you care about. If Safe Mode works, copy your files out now. If it doesn't, a technician can pull the drive and read your files from another machine — undramatic, routine work for any tech on Koadi. What's recoverable and what to stop doing in the meantime is covered in the lost files guide, and once this is over, set up a real backup so the next failed update is an errand instead of a hostage situation.
An update that fails repeatedly on a machine that has also grown slow or noisy can be the first symptom of a failing drive — updates write thousands of files, so they trip over bad sectors before anything else does.
Reset this PC — what it really costs
Reset this PC, on the Troubleshoot menu, reinstalls Windows. The "Keep my files" option preserves your documents but removes every installed program and setting, which means an evening of reinstalling software and signing back into things. It works, and it's the right call once everything above has failed — but it's the second-to-last resort, not the first. The last is a clean install from a USB stick, which erases everything and belongs only after your files are safely off the drive.
If this isn't the machine's first crisis, it's fair to ask whether it deserves another rescue — upgrade or replace walks through that decision without sentiment.
If the recovery menu isn't how you want to spend the evening
Everything above is doable, but it's fiddly, and a machine that won't boot can't be fixed over a screen-share. Post the problem free on Koadi in plain words, and a vetted, identity-verified technician picks it up — you set a fixed price or take bids. A local tech can come to the machine, get your files off first, then fix the boot, with payment held in escrow until you approve the work. Once it starts again, Koadi's remote help covers the follow-up anywhere in the US — pausing updates, setting up that backup — evenings and weekends included.