The StackHash error occurs when DEP is invoked and has an issue with whatever application you’re trying to run (and there are several hundred out there that seem to give it fits). The error is related to Data Execution Prevention.
We will narrow down on the issue, by booting the computer in clean boot. To boot the computer in clean boot refer the link:
http://support.microsoft.com/kb/929135
If the issue does not persist after booting in clean boot state, then continue with the troubleshooting to check which application or software is causing the explorer to crash, you may continue with step 2 from the above link.
Make sure you reset the computer to normal mode from step 7 after completing with troubleshooting.
After finding which application is causing the problem, you may follow the below steps:
1 Open the Start menu and click Control Panel
2 Browse to System Maintenance then System
3 In the left panel, select Advanced System Settings from the available links
4 You should now see the System Properties Window, which will have three sections. The top section is labeled Performance and has a Settings button. Click this button.
5 Select the Data Execution Prevention tab.
6 Select the option which reads Turn on DEP for all programs and services except those I select.
7 Use the Browse button to locate the executable file for the application you were trying to start when you received the StackHash error, and click Open to add it to your exceptions list.
8 Click Apply or OK to commit your changes.
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