ASUS's article for Windows Update that fails to install starts, like its others, with updating the BIOS, Windows and drivers, and then gives repair commands. Among them is the Deployment Image Servicing and Management command DISM.exe /Online /Cleanup-image /Restorehealth, which repairs the Windows component store. ASUS also says the update takes some time and that you must keep the AC adapter connected during the process and must not force a shutdown. For a machine that fails after the update, ASUS's other articles give the recovery routes. On a handheld such as the ROG Ally X, a big update can take long enough to drain the battery, so plug it in first.
On the Snapdragon Vivobook S15, some updates and drivers are Arm-specific, so use the ASUS and Windows update channels rather than downloading drivers from other sources.
Differential
Likely causes of “ASUS laptops operating-system update will not install”, and how to tell them apart
- 1
Low disk space
What separates it The update says it needs space or fails at download
How to confirm Run Storage Sense and free space; see the storage page
- 2
An outdated BIOS or driver
What separates it One update fails on a graphics, chipset or wireless driver
How to confirm Update the BIOS and drivers through MyASUS System Update first
- 3
Damaged Windows components
What separates it The update fails repeatedly with a code because of damaged Windows components
How to confirm Run DISM.exe /Online /Cleanup-image /Restorehealth in an administrator window, as ASUS's article shows
- 4
An interrupted update
What separates it The machine lost power or was forced off because of an interrupted update
How to confirm Keep the AC adapter connected and do not force a shutdown; use recovery if Windows will not start
- 5
Accessories or software in the way
What separates it The update fails with devices or security software attached
How to confirm Disconnect accessories and pause third-party security software during the update
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which ASUS machine you have, its Windows version and the update code that fails
- Free space on C: and whether the charger is connected
- Whether MyASUS System Update shows pending BIOS or driver updates
- Whether you have a recent backup of your files before making any big change
Try in this order
0 of 7 completedConnect power
ReversibleConnect power, and keep the charger connected for the whole update of Windows, and then test again to see whether it helped.
Free space
ReversibleFree space, by running Storage Sense to clear room for the update on the drive.
Update BIOS and drivers
ReversibleOpen MyASUS and choose System Update, which lists the drivers, BIOS and firmware ASUS has published for this exact model.
Run the Windows Update troubleshooter
ReversibleOpen Settings, System, Troubleshoot, Other troubleshooters and run the Windows Update troubleshooter, then follow what it reports.
Run DISM
ReversibleRun DISM, in an administrator window, by running DISM.exe /Online /Cleanup-image /Restorehealth, as ASUS's article shows.
Restart and retry
ReversibleRestart and run Windows Update again, since some updates install only after another one has been applied first.
Recover if needed
ReversibleRecover if needed, and after a backup, use Cloud Recovery or installation media, and then test again to see whether it helped.
Model-specific
What is true of this model and not of its siblings
- Update tools
- MyASUS System Update installs BIOS and drivers; EZ Flash updates the BIOS from a USB drive; Windows Update installs Windows. All five machines use them.
- Space and power
- ASUS gives no figure for space; leave several gigabytes free. Keep the charger connected, especially on the Ally X.
- Repair cost
- A failed update usually clears with a retry, free disk space and a restart, at no cost. If a hardware fault is behind it, an independent shop repair is typically $99 to $299 with a free diagnostic, per BadgerLayer's 2026 laptop repair guide.
- Other models this page answers
- These steps also fit the ProArt P16 H7606, ROG Zephyrus G14 GA403, Vivobook S 15 S5507, ROG Ally X handheld.
Stop boundary
When this stops being a self-service repair
- !If the update fails after DISM and the driver and BIOS updates, use Cloud Recovery after a backup
- !If Windows will not start after the update, follow the recovery page
- !If the drive reports errors in diagnostics, contact an ASUS service center
Evidence ledger
Sources behind this answer
BIOS and driver updates, the DISM repair command, keeping the adapter connected and not forcing a shutdown.
Freeing space for updates.
Cloud Recovery and installation media if Windows is damaged.
The Zenbook premium ultrabook line.
The Vivobook mainstream laptop line.
The ROG Ally handheld gaming PC line.
Exact questions
Common questions
Why does a Windows update fail with the disk nearly full?+
Windows needs free space to unpack and stage an update. Free several gigabytes first, restart and run Windows Update again, since a full drive is one of the commonest reasons an update stops partway.
Should I update the BIOS at the same time?+
No. Do one change at a time. Finish the Windows update, confirm the laptop is stable, then update the BIOS from the ASUS support page for your model, keeping the charger connected the whole time.
What is worth noting before I try again?+
Write down the exact error code and the update name from Windows Update history. The code identifies the failing stage, and it is the first thing ASUS or Microsoft support will ask for.
What repair command does ASUS give?+
DISM.exe /Online /Cleanup-image /Restorehealth, run in an administrator window to repair the Windows component store.
Why keep the charger connected?+
ASUS says updating takes some time, so make sure the AC adapter is connected and do not force a shutdown to prevent problems.
Should I update the BIOS first?+
ASUS lists updating the BIOS and drivers as the first step. Use MyASUS System Update or the EZ Flash tool.
Does the Ally X update the same way?+
Yes. ASUS's article covers gaming handhelds; keep it plugged in during updates.
Can I download drivers from other sites?+
Use MyASUS and Windows Update. On the Snapdragon Vivobook, drivers are Arm-specific, so wrong downloads can fail.
What if Windows will not start after the update?+
Follow the recovery page: EC reset, Cloud Recovery in the BIOS or MyASUS WinRE, or installation media.
Do I need a part number for an update?+
No. MyASUS chooses the BIOS and drivers for your model.