Check this first
The short answer
If Task Manager is visible, restart Windows Explorer. If it is absent from Processes, use Run new task to launch explorer.exe. If even Ctrl + Alt + Delete cannot be seen and the monitor reports No signal, inspect the monitor, input and cable before attempting unseen commands.
- Check whether the sign-in screen, pointer and Ctrl + Alt + Delete screen are visible.
- With visible Task Manager, restart or launch Windows Explorer.
- If the entire display is absent, inspect monitor input, connections and output.
- If it returns temporarily but recurs, compare startup apps and update times.
Choose your next check
Start with the row that matches your situation. Change one setting at a time so you can tell what helped.
| What you see | What to compare | Go to |
|---|---|---|
| A pointer moves after sign-in and Task Manager opens | Look for Windows Explorer in Processes. | Step 2 |
| The pointer is visible but Task Manager is not | Check the Ctrl + Alt + Delete security screen. | Step 1 |
| Sign-in was visible but the whole display then disappears | Inspect external output, cables and a temporary graphics fault. | Step 3 |
| No startup logo/sign-in image; the monitor says No signal | Compare monitor power, input, cables and another screen. | Step 3 |
| explorer.exe restores the desktop but the next sign-in fails | Compare startup apps and recent changes. | Step 4 |
| The security screen works but Task Manager/recovery attempts fail | Use a visible recovery environment for Safe Mode. | Step 5 |
Check in this order
Continue this issue
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Step 1: First establish which Windows screens are visible
- Save any work you can still access. Check whether startup and sign-in were visible before the pointer-only black screen. If No signal began before sign-in, use Step 3.
- Press Ctrl + Alt + Delete once. A visible security screen means Windows can output at least that screen. Select Task Manager there or press Ctrl + Shift + Esc; if its window appears, use Step 2.
- If only the security screen appears, check whether Task Manager is on another display, then use Step 3. If no Windows screen is visible, also use Step 3. Do not enter commands into an unseen window.
What the result means and what to do next
| Situation | What it tells you | Next action |
|---|---|---|
| Task Manager is visible | Part of the Windows interface is functioning. | Inspect Explorer in Step 2. |
| Only Ctrl + Alt + Delete is visible | The symptom does not prove a complete display failure. | Try Task Manager; if it remains invisible, use Step 3, then Step 5. |
| No Windows screen is visible | A stopped desktop shell has not been established. | Inspect power/input and cables in Step 3. |
- Expected result or what you learned
- A visible Task Manager lets you continue with controlled desktop recovery.
- If something is wrong or unclear
- For No signal or an invisible Task Manager, check the entire display path in Step 3.
- How to undo changes
- These inspection keys change no persistent setting. Close Task Manager when finished.
Step 2: Restore the desktop from visible Task Manager
- In Processes, find Windows Explorer. If present, select Restart, or right-click → Restart. Wait for the desktop/taskbar; the screen may briefly redraw. Avoid interrupting an active Explorer file operation and save work first.
- If Windows Explorer is absent, choose Run new task (or File → Run new task in an older layout), enter explorer.exe and select OK. This starts the Windows desktop program; do not try unknown executables or registry edits.
- Once the desktop returns, back up work and check needed apps. Restart normally and sign in again. If the problem returns or the desktop vanishes immediately, continue to Step 4 or follow the matching result below.
What the result means and what to do next
| Situation | What it tells you | Next action |
|---|---|---|
| Desktop/taskbar return and the next sign-in works | The shell may have stopped temporarily. | Check files and stop; use Step 4 if it recurs. |
| The next sign-in returns to a black screen | An ongoing startup condition needs investigation. | Compare changes and timing in Step 4. |
| explorer.exe fails or immediately disappears | This action has not resolved the problem. | Record the error and use Step 5. |
- Expected result or what you learned
- Desktop and taskbar return and remain usable after a normal restart and sign-in.
- If something is wrong or unclear
- Record any error and exactly which action changed the screen; temporary recovery alone is not a full resolution.
- How to undo changes
- Starting/restarting Explorer changes no saved configuration, but interrupted or unsaved Explorer work may be lost.
Step 3: For a completely absent picture, inspect the display path
- Check external-monitor power, No signal status and the actual HDMI/DisplayPort input. Reseat both cable ends and compare another cable or screen. On a laptop, compare the built-in screen with external displays/dock disconnected.
- If there is evidence Windows started, such as a previously visible sign-in screen, press Windows + Ctrl + Shift + B once and watch for recovery after a beep/flicker. Use Windows + P to compare output modes only when you can see the choices. Do not repeatedly cycle an invisible menu.
- If another screen shows Windows, narrow the original monitor, input, cable and mode one at a time. If no screen ever shows the startup logo, distinguish this from a post-sign-in shell problem and contact the PC/monitor manufacturer.
What the result means and what to do next
| Situation | What it tells you | Next action |
|---|---|---|
| Another screen or cable shows sign-in | The original display path deserves priority. | Inspect the mode visibly and restore one component at a time. |
| A graphics reset restores sign-in or desktop | A temporary display-processing problem may contribute. | If it returns after restart, use Step 4. |
| No display shows the startup logo | The issue is not confined to Windows sign-in. | Give power, cable and monitor comparisons to the manufacturer. |
- Expected result or what you learned
- A working comparison display helps narrow the affected output path.
- If something is wrong or unclear
- If the security screen works but Task Manager remains unavailable, use Step 5. With no startup logo on any screen, seek hardware/display diagnosis.
- How to undo changes
- Restore the recorded monitor input, Windows projection mode and needed cable/dock connections.
Step 4: For recurring black screens, compare startup conditions
- While the screen works, record Settings → Windows Update → Update history names/times. Compare graphics-driver updates, new background apps and display connections. Matching dates suggest a candidate, not proof.
- Open Task Manager → Startup apps. Disable only one recently added/enabled candidate, then restart normally and sign in. If it helps, check that app’s updates/support; if unchanged, enable it again. Do not disable Windows system apps or security functions as a group.
- If another existing user account works, prioritize the original user’s sign-in environment. For managed PCs or Azure Virtual Desktop, give the administrator update names and dates. Microsoft documents a similar issue primarily on AVD hosts using FSLogix; do not generalize it to every home PC.
What the result means and what to do next
| Situation | What it tells you | Next action |
|---|---|---|
| Disabling one app restores normal sign-in | That app may contribute. | Check its provider’s update/guidance and cautiously compare re-enabling when appropriate. |
| Another user works, or recurrence began after an update | The user environment or update is a candidate. | Record account scope, update and time for Step 5 or the administrator. |
| Disabling the candidate makes no difference | That app alone does not explain the symptom. | Restore its state and use Step 5. |
- Expected result or what you learned
- A controlled before/after sign-in comparison narrows a startup condition.
- If something is wrong or unclear
- If every user is affected or no candidate helps, use Step 5. Do not remove a Windows update without evidence.
- How to undo changes
- Enable the tested app again in Startup apps, unless you deliberately keep that identified app from auto-starting while its issue is resolved.
Step 5: Use a visible recovery screen to compare Safe Mode
- Before restarting, have the account password and, for encrypted devices, BitLocker recovery key available. From visible sign-in or Ctrl + Alt + Delete, hold Shift while choosing Power → Restart. In recovery choose Troubleshoot → Advanced options → Startup Settings → Restart, then 4 or F4 for Safe Mode. PIN/biometric sign-in is unavailable there; use the password.
- If Safe Mode shows the desktop, inspect the recent app change from Step 4. For an immediately preceding graphics-driver update, record the current version and use Device Manager → Display adapters → GPU Properties → Driver → Roll Back Driver only if available and permitted. An unavailable button means no retained previous version; do not install a guessed driver. Restart normally and compare sign-in.
- If Safe Mode is also black or recovery cannot be seen, stop unseen operations and recheck the display path. With visible recovery but persistent startup failure, discuss options such as Advanced options → Startup Repair with the manufacturer/administrator. Assess backup status and consequences before System Restore or uninstalling updates.
What the result means and what to do next
| Situation | What it tells you | Next action |
|---|---|---|
| Safe Mode works but normal startup is black | A normal-startup app, driver or setting is a candidate. | Compare recent changes individually and back up once normal access returns. |
| Rollback restores normal sign-in | The recent driver change may contribute. | Record before/after versions and the manufacturer-supported package. |
| Safe Mode/recovery is also invisible | These screen-based checks cannot establish the cause. | Send model, display results and update history to the manufacturer/administrator. |
- Expected result or what you learned
- The normal-versus-Safe-Mode comparison identifies an app/driver candidate, followed by a normal sign-in check.
- If something is wrong or unclear
- Stop if the password or BitLocker key is unavailable or recovery is invisible; ask the administrator/manufacturer.
- How to undo changes
- A normal restart exits this one-time Safe Mode selection. For another problem after rollback, use the recorded version to ask the PC/GPU manufacturer about a compatible package. Assess restoration scope before further recovery operations.
When to ask for help
Provide pre-sign-in visibility, pointer/security-screen/Task-Manager results, the response to explorer.exe, display/cable comparisons, update names/times and Safe Mode results. Save accessible work first; forced power-off loses unsaved work. Do not reset the PC or delete a user profile without backing up important files.
FAQ
Does launching explorer.exe prove the problem is fixed?
It may only restore the desktop temporarily. Save files, restart normally and sign in again; recurring failure needs the startup comparison in Step 4.
What if the pointer moves but Ctrl + Shift + Esc does not work?
Try Ctrl + Alt + Delete and choose Task Manager from the visible security screen. Check other connected displays for its window; if it remains invisible, use Step 3.
Is this necessarily the black-screen issue reported in September 2026?
No. Microsoft’s notice describes desktop loading failures after August 2026 preview and later updates, primarily on Azure Virtual Desktop hosts using FSLogix. The referenced hotpatch applies only to enrolled eligible devices. A similar home-PC symptom does not establish that cause; compare history and environment, and let managed-device administrators assess the notice.
What if neither the sign-in screen nor startup logo appears?
Treat it separately from a post-sign-in shell failure. Compare monitor power, selected input, cables and another screen in Step 3, then seek PC/monitor inspection if none shows startup.
Sources
English adaptation preserving the Japanese guide’s diagnostic branches, steps, result tables and restoration conditions. Official sources support the controls; the order of comparisons is editorial guidance, not proof of a particular cause or a claim of testing every PC. Consult the administrator for managed devices.
Microsoft: blank screens and ExplorerMicrosoft: startup app controlsMicrosoft: recovery environmentMicrosoft: Safe Mode and startup settingsMicrosoft: Safe Mode sign-in passwordMicrosoft: display-driver rollback conditionsMicrosoft: 2026 managed-environment desktop-loading notice