DPC Watchdog Violation Blue Screen [Fixed]
Blue screen of death error, sure is a nightmare for all Windows users. When your PC screen goes into a blue screen, there is nothing left for you to do except to restart your machine and risk losing all your unsaved work.
In all the blue screen of death error, DPC_WATCHDOG_VIOLATION is one of the most commonly seen error message on Windows 10 and Windows 8. Luckily, there are always fixes for you to try.
If you’re seeing DPC_WATCHDOG_VIOLATION appearing on your screen, and you have no idea what to do next, you’re not alone. As mentioned, this error is quite common, and you have access to 5 solutions here in this post.
What does DPC Watchdog Violation mean?
First off, this blue screen of death error bug check has a value of 0x00000133. 
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. 
Why do I have this blue screen error?
In most cases, you will see this error when your device driver(s) is outdated or installed wrongly.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.
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.
Method 1: Change SATA ACHI controller driver
Method 2: Update all available drivers
Method 3: Check hardware and software compatibility
Method 4: Perform a disk check
Method 5: Run Event Viewer
IMPORTANT: 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 and restart it in Safe Mode, then try these solutions.
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 the Windows logo key and X at the same time, then click Device Manager.
2) Expand IDE ATA/ATAPI Controllers.
3) Right-click SATA ACHI controller and click Properties.
To verify that you’ve chosen the correct controller: go to the Driver tab, click Driver Details.
Make sure the iaStorA.sys is listed as a driver. Click OK to exit.
If you’re seeing storachi.sys listed here, move on to method 2 for more help.
5) Click Driver and then Update Driver….
6) Click Browse my computer for driver software.
7) Click Let me pick from a list of device drivers on my computer.
8) Click Standard SATA AHCI Controller, then click Next. Finish the rest of the procedure as instructed.
9) Restart your computer after for the change to take effect.
Note: 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.
If you’re seeing storachi.sys listed in the properties of SATA ACHI controller driver, you should update your driver in this way.
In addition, one reason for DPC 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.
If you’re not confident playing around with drivers manually, you can 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.
You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):
1) Download and install Driver Easy.
2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.
3) Click the Update button next to all flagged devices to automatically download and install the correct version of their driver (you can do this with the FREE version).
Or 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 (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).
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.
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 Method 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.
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 the Windows logo key, type cmd in. Right-click Command Prompt and click Run as administrator.
When prompted with the administrator permission, click Yes to continue.
2) Type chkdsk /f /r, then press Enter on your keyboard.
3) Press Y 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.
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.