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Get the fix to "<strong>0x0000009F: DRIVER POWER STATE FAILURE</strong>" error for<strong> Windows XP, Vista, 7, 8,</strong><strong> 8.1</strong> or <strong>10</strong> operating systems.
<h2>About the "<strong>0x0000009f</strong>" error</h2>
[kbintro]
<h3>Description and Symptoms</h3>
The error messages, alerts, warnings, and symptoms below are tied to this error.
<h4>Symptom 1: 0x0000009f error screen on startup</h4>
This error, which is also known as DRIVER POWER STATE FAILURE is usually triggered by a driver-related issue and usually appears after a fresh driver installation.

<a href="https://neosmart.net/wiki/wp-content/uploads/sites/5/2015/05/0x0000009F-DRIVER-POWER-STATE-FAILURE-screenshot.jpg"><img class="alignnone wp-image-3387 size-full" src="https://neosmart.net/wiki/wp-content/uploads/sites/5/2015/05/0x0000009F-DRIVER-POWER-STATE-FAILURE-screenshot.jpg" alt="Screenshot for 0x0000009F error" width="980" height="650" /></a>
<pre>A problem has been detected and Windows has been shut down to prevent damage 
to your computer.

DRIVER_POWER_STATE_FAILURE

If this is the first time you’ve seen this Stop error screen, 
restart your computer. If this screen appears again, follow
these steps:

Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.

If problems continue, disable or remove any newly installed hardware 
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use Safe Mode to remove or disable components, restart
your computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.

Technical Information:

*** STOP: 0x0000009F (0x00000001, 0x00000001, 0x00000000, 0x00000000)

Beginning dump of physical memory
Physical memory dump complete.
Contact your system administrator or technical support group for further
assistance.</pre>
<h3>Causes of this Error</h3>
This error has been known to occur as a result of one or more of the following:
<h4>Cause 1: Outdated or misconfigured driver</h4>
The main cause of this error is a device driver that is outdated or misconfigured. This may happen after a system update, a disk read/write error, or a Windows update or reinstall.
<h2>Fixing "0x0000009f" on Windows</h2>
[setupcd]
<h3>Fix #1: Disconnect peripherals</h3>
If the 0x0000009F error is caused by a recently added new piece of hardware, try to following steps:
<ol>
 	<li>Shutdown your computer</li>
 	<li>Remove the new added hardware</li>
 	<li>Power on your computer again</li>
 	<li>Check if the error appears again</li>
</ol>
<h3>Fix #2: Update drivers</h3>
If the 0x0000009F error is caused by a driver installation, you can fix the error by updating your driver to its latest version or to a version that's compatible with your current Windows version.

Follow these steps:
<ol>
 	<li>Click <strong>Start</strong></li>
 	<li>Search for <code>devmgmt.msc</code></li>
 	<li>At <em>Device Manager</em>, right-click on the device you want to update the driver for</li>
 	<li>Select <strong>Update driver</strong></li>
</ol>
[caption id="attachment_4557" align="alignnone" width="800"]<a href="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Update-drivers.png"><img class="wp-image-4557 size-full" src="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Update-drivers.png" alt="Device manager update driver screen" width="800" height="600" /></a> Device manager update driver screen[/caption]
<h3>Fix #3: Run Driver Verifier</h3>
The <strong>Driver Verifier</strong> tool tests your currently installed drivers and can identify corrupt and problematic files. If the 0x0000009F error is caused by a driver, the Driver Verifier report can output problematic drivers.

The Driver Verifier is already installed on your Windows. To open it, follow these steps:
<ol>
 	<li>Click <strong>Start</strong></li>
 	<li>Type <code>cmd</code> at the search results</li>
 	<li>Right-click on Command Prompt and click <strong>Run as Administrator</strong></li>
 	<li>Type <code>verifier</code> when Command Prompt is open</li>
 	<li>Hit <kbd>Enter</kbd></li>
 	<li>Select <strong>Create standard settings</strong></li>
 	<li>Click <strong>Next</strong></li>
 	<li>Choose <strong>Automatically select all drivers installed on this computer</strong></li>
 	<li>Click <strong>Finish</strong></li>
</ol>
[caption id="attachment_4558" align="alignnone" width="980"]<a href="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Driver-verifier.png"><img class="wp-image-4558 size-large" src="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Driver-verifier-1024x592.png" alt="Driver verifier utility screen" width="980" height="567" /></a> Driver verifier utility screen[/caption]
<h3>Fix #4: Check digital signatures of drivers</h3>
The <strong>sigverif</strong> tool verifies your system's integrity by testing if the drivers you currently have installed have a valid digital signature.

If sigverif reports drivers that have invalid signature, try to disable the driver or update to its latest available version.
<ol>
 	<li>Click <strong>Start</strong></li>
 	<li>Type <code>sigverif</code> in the search box</li>
 	<li>Hit <kbd>Enter</kbd></li>
 	<li>Click <strong>Advanced</strong></li>
 	<li>Select "Look for other files that are not digitally signed"</li>
 	<li>At the <em>Look in this folder</em>, type <code>C:\Windows\system32\drivers</code>Replace <code>C:</code> with the letter of the drive where your Windows is installed on.</li>
 	<li>Go to <strong>Logging </strong></li>
 	<li>Check the "Save the file signature verification results to a log file" checkbox</li>
 	<li>Click <strong>OK</strong></li>
 	<li>Click <strong>Start</strong></li>
</ol>
[caption id="attachment_4559" align="alignnone" width="800"]<a href="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Sigverif.png"><img class="wp-image-4559 size-full" src="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Sigverif.png" alt="Signature verifier utility screen" width="800" height="600" /></a> Signature verifier utility screen[/caption]
<h3>Fix #5: Uninstall problematic software</h3>
If the 0x0000009F error appears after a recent software installation, try to remove it to check if the error appears:
<ol>
 	<li>Go to <strong>Control Panel</strong></li>
 	<li>Uninstall the program</li>
 	<li>Restart your computer</li>
 	<li>Make sure the program was uninstalled correctly</li>
</ol>
You can reinstall the program again and check if the error appears again after reinstallation.

[caption id="attachment_4560" align="alignnone" width="980"]<a href="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Uninstall.png"><img class="wp-image-4560 size-large" src="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/Uninstall-1024x592.png" alt="Program and features uninstall screen" width="980" height="567" /></a> Program and features uninstall screen[/caption]
<h3>Fix #6: Run sfc</h3>
<ol>
 	<li>Click <strong>Start</strong></li>
 	<li>Type <code>cmd</code> in the search box</li>
 	<li>Right-click Command Prompt</li>
 	<li>Select <strong>Run as Administrator</strong></li>
 	<li>Type:
<pre>sfc /scannow</pre>
</li>
 	<li>Hit <kbd>Enter</kbd></li>
</ol>
[caption id="attachment_4561" align="alignnone" width="800"]<a href="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/sfc1.png"><img class="wp-image-4561 size-full" src="https://neosmart.net/blog/wp-content/uploads/sites/5/2015/05/sfc1.png" alt="sfc utility results screen" width="800" height="600" /></a> sfc utility results screen[/caption]
<h3>Fix #7: Reinstall Windows</h3>
If none of the fixes above work to fix the error, reinstall Windows:
<p class="warning">Reinstalling Windows will delete all files. Use <a href="https://neosmart.net/EasyRE/">Easy Recovery Essentials</a> to backup your files before you proceed.</p>

<ol>
 	<li>Insert the installation DVD</li>
 	<li>Restart the computer</li>
 	<li>Press any key to boot from the CD when prompted to do so</li>
 	<li>At the <em>Install Windows</em> window, select a language, time and keyboard method</li>
 	<li>Click <strong>Next</strong></li>
 	<li>Click <strong>Install Now</strong>

[caption id="attachment_1505" align="alignnone" width="800"]<a href="https://neosmart.net/wiki/wp-content/uploads/sites/5/2013/10/Install-Now-Windows-7.jpg"><img class="wp-image-1505 size-full" src="https://neosmart.net/wiki/wp-content/uploads/sites/5/2013/10/Install-Now-Windows-7.jpg" alt="Windows 7 setup Install Now dialog, with repair your computer link" width="800" height="600" /></a> Install Now (Windows 7)[/caption]</li>
</ol>
<h2>More Information</h2>
<h3>Linked Entries</h3>
<ul>
 	<li><a href="https://neosmart.net/wiki/sfc/">sfc</a></li>
</ul>
[partial name="partial_moreinfo" versions="xp,vista,7,8,10"]