Windows 7 Random Blue Screens After April 2019 Windows Update

If you're in the middle of your work, and suddenly you see the blue screen popping up saying that you're having a DPC WATCHDOG VIOLATION blue screen error, you're not alone. Many Windows users have reported about this error. But no need for you to worry about it, this error is possible to fix.

5 fixes for DPC WATCHDOG VIOLATION

Here are 5 fixes for you to try.You may not need to try them all; just work your way down until you find the one works for you.

1. Change SATA AHCI controller driver
2. Update all available drivers
3. Check hardware and software compatibility
4. Perform a disk check
5. Run Event Viewer

You'll need to be logged into Windows on the problem computer to try any of these solutions. If you can't log into Windows, power on and off your PC 3 times to perform a hard reboot andrestart it in Safe Mode, then try these solutions.

What isDPC Watchdog Violation?

The DPC Watchdog Violation blue screen of death bug check has a value of0x00000133. ^[1]

DPC stands for Deferred Procedure Call.Watchdog refers to the bug checker, which usually monitors or track your Windows programs and your PC performance.

When you see the Violation message, your PC watchdog (aka bug checker) is overwhelmed. Probably because a DPC is running too long a time, or your system is stuck at an interrupt request level (IRQL) of DISPATCH_LEVEL or above.^[1]

Why would I have theDPC Watchdog Violationerror?

In most cases, you will see this error when your device driver(s) is outdated or installed wrongly. For example, if you haven't installed the video card driver for your new operating system, DPC Watchdog Violation could easily happen when you try to watch a video online.

In some cases, incompatible hardware with your operating system can be the cause as well. For example, if your external hard driver is not longer supported by Windows 10, or that you have recently installed a new hardware device on your older computer, you will see DPC Watchdog Violation error as well.

Sometimes, this error could be caused by software conflict, although not as common as the two causes above.

Fix 1: Change SATA AHCI controller driver

This is the most effective method according to a wide range of Windows users. So you might want to try it first:

1. On your keyboard, press theWindows logo keyand X at the same time, then clickDevice Manager.
   
2. ExpandIDE ATA/ATAPI Controllers.
   
3. Right-clickSATA AHCI controller and click Properties.
   
4. To verify that you've chosen the correct controller: go to theDriver tab, clickDriver Details.
   
   Make sure the iaStorA.sys is listed as a driver. Click OK to exit.
   
   If you're seeing storahci.sys listed here, move on to Fix 2 for more help.
   
5. Navigate to the Driver tab, then clickUpdate Driver….
   
6. SelectBrowse my computer for driver software.
   
7. ClickLet me pick from a list of device drivers on my computer.
   
8. ClickStandard SATA AHCI Controller, then clickNext. Finish the rest of the procedure as instructed.
   
9. Restart your computer after for the change to take effect.
   

You may need to repeat the same procedure again every time after your Windows update. This is a normal situation. So there is no need for you to worry about it.

Fix 2: Update available drivers

If you're seeing storahci.sys listed in the properties of SATA AHCI controller driver, you should update your driver in this way.

In addition, one reason forDPC Watchdog Violation is outdated drivers for your hardware devices. You should verify that all your devices have the right and latest drivers, and update those that don't.

Manual driver update – You can update your drivers manually by going to the manufacturer's website and searching for the most recent correct driver.

Automatic driver update – If you don't have the time, patience or computer skills to update your drivers manually, you can, instead, do it automatically with Driver Easy.

Driver Easy will automatically recognize your system and find the correct drivers for it. You don't need to know exactly what system your computer is running, you don't need to risk downloading and installing the wrong driver, and you don't need to worry about making a mistake when installing.Driver Easy takes care of everything.

1. Download and install Driver Easy.
2. Run Driver Easy and click theScan Now button. Driver Easy will then scan your computer and detect any problem drivers.
   
3. Click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system. You need the Pro version of Driver Easy to do this, so you'll be prompted to upgrade.
   

Don't worry; it comes with a 30-day money-back guarantee, so if you don't like it you can get a full refund, no questions asked.

Alternatively, if you're comfortable manually installing drivers, you can click 'Update' next to each flagged device in the free version to automatically download the correct driver. Once it's downloaded, you can manually install it.

If you need assistance, please contactDriver Easy's support team atsupport@drivereasy.com.

Fix 3: Check hardware and software compatibility

As mentioned, incompatible hardware devices with your PC operating system, and/or conflicted software programs could be one of the causes of the DPC Watchdog Violation error as well.

Check hardware compatibility

If you have some external devices plugged or installed on your PC, such as external hard drive or a USB flash drive, disconnect them all (leave your mouse and keyboard connected), then restart your computer.

See if this error persists. If the error stops, plug your external devices back, only one at a time, then restart your PC. If you get the error again after certain device, you have got the culprit already. You can either replace this device completely from your PC, or update its driver as instructed in Fix 2.

Check software compatibility

If this error only happens very recently, try to reflect if you have made some changes to your PC. For instance, have you installed a new application, or have you upgraded some programs.

If you are not sure what changes you have done, you might want to do a system restore, to help you go back to the previous stage of your PC.

Fix 4: Perform a disk check

A blue screen of death error could indicate a disk problem. You may want to make sure that your disk is at a good state:

1. On your keyboard, press theWindows logo key and R at the same time to invoke the Run dialog. Type cmd and press Ctrl, Shift and Enter at the same time to run Command Prompt as administrator.
   
   When prompted with the administrator permission, click Yes to continue.
   
2. On your keyboard, typechkdsk /f /r, then pressEnter.
   
3. PressY on your keyboard.
   

IMPORTANT: Disk check will start the next time you boot your PC and it might take some time to complete (could be a day for some). If, when you restart, you don't have time to wait for the disk check to complete, you can skip it. You'll need to reschedule it again, as described above, though.

Fix 5: Run Event Viewer

This method does not provide you with a solution, but you might be able to find the culprit driver or device that is causing you the DPC Watchdog Violation blue screen error.

1. On your keyboard, press the Windows logo key and X at the same time. Then click Event Viewer.
   
2. On the left side of the panel, click Windows Logs, and then System.
   
3. In the middle part of the panel, you will be able to some entries. Check the ones marked by Error or Warning, then you should be able to see the detailed information of what exact went wrong at a certain time range.
   

Reference

[1] Microsoft debugger bug check 0x133

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Source: https://www.drivereasy.com/knowledge/dpc-watchdog-violation-on-windows-10-fixed/

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