Windows 10 Bugs and Issues: 7 Common Problems and Fixes

Your PC is taking forever to boot. An update just failed for the third time. The audio cut out after the last patch. Sound familiar?

Windows 10 has been around since 2015 and Microsoft has released dozens of cumulative updates. Some introduced new Windows 10 bugs and issues. Others fixed old ones and created new ones. The good news is most of these problems have clear, repeatable fixes.

Here’s what to do about each of them.

Why Does Windows 10 Have So Many Bugs?

Windows 10 runs on hundreds of millions of different hardware combinations. A driver update that works perfectly on one machine breaks audio on another. A cumulative update that fixes a security flaw can conflict with older software. That’s not an excuse. It’s just the reality of why these issues keep appearing.

The fixes below work for the vast majority of users. If a fix doesn’t resolve your issue, the next section usually will.

Bug 1: Windows 10 Slow Startup

If Windows 10 takes more than 30 seconds to load to the desktop, fast startup is likely misconfigured or too many programs are launching at startup. In most cases, disabling just 3 to 5 startup programs cuts boot time by half.

Fix 1: Disable unnecessary startup programs.

1. Press Ctrl+Shift+Esc to open Task Manager.
2. Click the Startup tab.
3. Right-click programs with High startup impact and select Disable.

Fix 2: Enable Fast Startup (if not already on).

1. Go to Control Panel then Power Options then Choose what the power buttons do.
2. Click Turn on fast startup.

Bug 2: Windows 10 Update Fails or Loops

Windows Update failures (error codes like 0x80070005, 0x800705b4 or 0x80073712) are among the most common Windows 10 issues. Don’t just retry the update. Run the troubleshooter first.

Fix: Run the Windows Update Troubleshooter.

1. Go to Settings then Update and Security then Troubleshoot.
2. Click Windows Update then Run the troubleshooter.
3. Follow the prompts. Windows diagnoses and attempts to fix the update issue automatically.

If the troubleshooter doesn’t resolve it, reset the Windows Update components manually via Command Prompt as administrator:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
ren C:WindowsSoftwareDistribution SoftwareDistribution.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Bug 3: Why Does Wi-Fi Keep Disconnecting on Windows 10?

Random Wi-Fi drops are almost always caused by power management settings that shut off the network adapter to save power. Windows does this automatically, but it causes more problems than it solves.

Fix: Disable adapter power saving.

1. Press Windows + X and click Device Manager.
2. Expand Network Adapters and right-click your Wi-Fi adapter.
3. Click Properties then Power Management.
4. Uncheck Allow the computer to turn off this device to save power.
5. Click OK.

Bug 4: Windows 10 Audio Not Working

After a Windows 10 update, audio sometimes stops working or becomes distorted. Nine times out of ten, it’s either the audio service or the driver, and both have fast fixes.

Fix 1: Restart the Windows Audio service.

1. Press Windows + R, type services.msc and press Enter.
2. Scroll to Windows Audio, right-click and select Restart.

Fix 2: Update or roll back the audio driver.

1. Open Device Manager.
2. Expand Sound, video and game controllers.
3. Right-click your audio device and select Update driver.
4. If updating does not help, right-click the device and select Properties then Driver then Roll Back Driver to return to the previous version.

Bug 5: Apps Crashing or Not Opening

Windows 10 apps from the Microsoft Store sometimes crash, freeze or fail to open after an update. Before you uninstall and reinstall, try resetting the app first. It takes 30 seconds and works more often than you’d expect.

Fix: Reset the app through Windows Settings.

1. Go to Settings then Apps then Apps and Features.
2. Find the affected app and click it.
3. Click Advanced options.
4. Click Reset. This clears the app’s cache and resets it to defaults.

Bug 6: Black Screen After Login

A black screen after login (with or without a cursor) is usually a graphics driver issue or an Explorer.exe crash. The fix takes less than a minute.

Fix: Restart Explorer via Task Manager.

1. Press Ctrl+Alt+Del and click Task Manager.
2. Go to File then Run new task.
3. Type explorer.exe and press Enter.

If this works temporarily but the black screen returns, update your graphics driver from the manufacturer’s website (NVIDIA, AMD or Intel). A new driver resolves this permanently in most cases.

Bug 7: High CPU or Disk Usage

Windows 10 sometimes pegs the CPU or disk at 100% usage due to Windows Search indexing, Windows Defender scanning or the SysMain (Superfetch) service. This is especially common right after an update. The system is catching up on background tasks.

Fix: Disable or reconfigure Windows Search indexing.

1. Open Services (services.msc).
2. Find Windows Search, right-click and select Properties.
3. Set Startup type to Disabled and click Stop.

For disk usage issues, also run Disk Cleanup (search for it in the Start menu) and delete temporary files and Windows Update cleanup files.

What to Do If You Lose Data During a Windows 10 Bug

Some Windows 10 bugs, particularly update failures and disk errors, can corrupt or lose files. If you use Outlook and run into OST file problems after a bug, see the guide on fixing Outlook OST errors for recovery steps. For backing up communication data before troubleshooting, see how to save Skype chat history.

For a broader safety net, Microsoft’s own Windows Backup guide walks you through creating a full system backup before any major troubleshooting session.

Frequently Asked Questions

How do I fix Windows 10 update errors?

Run the Windows Update Troubleshooter first (Settings then Update and Security then Troubleshoot). If that fails, reset the Windows Update components using the Command Prompt commands listed in the update section above.

Why is Windows 10 so slow after an update?

Updates trigger background processes like indexing and virus scanning that slow the system for 30 to 60 minutes after install. If slowness persists beyond an hour, check startup programs and disable unnecessary ones in Task Manager.

How do I stop Windows 10 from auto-updating?

Go to Settings then Update and Security then Windows Update then Advanced options and set the Active Hours so Windows doesn’t restart during your work hours. You can also pause updates for up to 35 days from the same menu.

What is the most common Windows 10 problem?

Windows Update failures are the most reported Windows 10 issue. The second most common is driver incompatibilities after a feature update, particularly with audio and network adapters.

How do I check if a Windows update caused a problem?

Go to Settings then Update and Security then View Update History to see recent updates. If a problem started after a specific update, roll it back via Settings then Update and Security then View Update History then Uninstall Updates.

Is Windows 10 still getting security updates?

Windows 10 support ended in October 2025. Microsoft no longer releases security updates for Windows 10. If you’re still running Windows 10, upgrading to Windows 11 is the right move now.

Which of these Windows 10 bugs have you run into? Drop a comment and let us know which fix worked for you.