Explorer error 0x71ab6a55

tsultan used Ask the Experts™
Getting DEP error @ startup for explorer.exe
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DEP is Microsoft's Data execution prevention, it prevents programs from executing within certain protected memory space. This could be caused by many things, and i would recommend running a virus scan on your computer (maybe in safe mode) first to make sure that this is not caused by malicious infections.

Once you verified your computer is not infected, and if the problem still persists, you can always turn off DEP by following one of the following two ways. (I am assuming this is a Windows XP machine)

First method:
1. Hold the "Windows logo key" and R key together to bring up the run menu.
2. type in sysdm.cpl and press enter to bring up system properties.
3. Click the Advanced tab, and settings under the Performance section.
4. Click the Data Execution Prevention tab and select "Turn on DEP for all programs and services except for those I select
5. Click Add.. and navigate to C:\Windows folder, and select explorer.exe

Alternative method:
1. Hold the "Windows logo key" and R key together to bring up the run menu.
2. Type in cmd and press enter to bring up the command line.
3. type in "cd\" to go to the root of your system. (You should see C:\>)
4. type in "attrib -h -s -r boot.ini" to unprotect your boot.ini
5. type in "notepad boot.ini" to open your boot.ini file
6. Locate "noexecute=optin" (It should be on the same line as "multi(0)disk(0)...") and change it to "noexecute=AlwaysOff". Save the file and exit.
7. at the command prompt, type in attrib +h +s +r boot.ini to re-protect your boot.ini.
8. Reboot the machine.

Hope this helps...


Done this before you suggested but still the issue exists.
the question is to vague for a straight answer so I will give instead some tips.
run a scandisk to fix any filesystem issues.
scan your computer for malware.http://www.malwarebytes.org/ 
scan the computer with a good antivirus like avast

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