What are HpCISSs.sys Error Messages?

HpCISSs.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with HpCISSs.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of HpCISSs.sys errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. Windows update) issues. Some of these errors include:

• HpCISSs.sys could not be found.
• HpCISSs.sys failed to load.
• The file HpCISSs.sys is missing or corrupt.
• Windows failed to start - HpCISSs.sys.

How to Fix HpCISSs.sys Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your HpCISSs.sys issue. These troubleshooting steps are listed in the recommended order of execution.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

1. Hit the Windows Start button
2. When you see the search box, type "System Restore" and press "ENTER".
3. In the search results, find and click System Restore.
4. Please enter the administrator password (if applicable / prompted).
5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
6. Restore your computer to that backup image.

If the Step 1 fails to resolve the HpCISSs.sys error, please proceed to the Step 2 below.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many HpCISSs.sys error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

1. Hit the Windows Start button
2. In the search box, type "Update" and press "ENTER".
3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
4. If updates are available for download, click "Install Updates".
5. After the update is completed, restart your PC.

If Windows Update failed to resolve the HpCISSs.sys error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your HpCISSs.sys File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate HpCISSs.sys file version. We maintain a comprehensive database of 100% malware-free HpCISSs.sys files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

1. Locate your Windows operating system version in the list of below "Download HpCISSs.sys Files".
2. Click the appropriate "Download Now" button and download your Windows file version.
3. Copy the file into the appropriate directory for your Windows version:


Windows Vista: C:\Windows\System32\DriverStore\FileRepository\hpcisss.inf_4f5031f1\
Windows Vista: C:\Windows\System32\drivers\
Windows Vista: C:\Windows\System32\DriverStore\FileRepository\hpcisss.inf_6f538943\
Windows Vista: C:\Windows\System32\DriverStore\FileRepository\hpcisss.inf_8838af7c\

4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows Vista.

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