How to Effectively Resolve ShellExecuteEx failed code1203

See how pesky ShellExecuteEx failed code1203 is

Victim: I have a "shellexecuteex failed code 1203" error, every time I try to open an .exe file windows says either "cannot access file, location is not available, C: / is not accessible or access denied". 90% of the files I try to open get an error code. Please help.

Learn more about ShellExecuteEx failed code1203

ShellExecuteEx is an important system routine function. It performs an operation on a specified file which can be an executable file or a document. If your PC is attacked by malicious software or viruses, or your antivirus program is conflict with ShellExecuteEx, you may fail to open the files and be announced that you have a ShellExecuteEx failed code1203 error.

Seeing ShellExecuteEx failed code1203 only means that your system is at high risk. To avoid further troubles and damages, you should try your best to get rid of the existing viruses as quickly as you can.

Useful instructions on how to fix ShellExecuteEx failed code1203

Solution A: Manually Remove ShellExecuteEx failed code1203

Before applying this manual removal method, please backup all your system files in case of any mistakes happen during the procedure.

1. Reboot your computer into Safe Mode with Networking

Restart your computer and keep pressing F8 key until Windows Advanced Options Menu shows up, then using arrow key to select Safe Mode with Networking from the list and press Enter to get into that mode

2. Stop suspicious running process in Windows Task Manager

Press CTRL+ALT+DEL or CTRL+SHIFT+ESC or Press the Start button, type "Run" to select the option, type "taskmgr" and press OK > end suspicious running process.

3. Show hidden files and folders

Open Control Panel in Start menu and search for Folder Options. When you're in Folder Options window, please click on its View tab, tick Show hidden files and folders and non-tick Hide protected operating system files (Recommended) and then press OK.

4. Go to the Registry Editor and remove all malicious registry entries

Hit Win+R keys and then type regedit in Run box to search

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MpCmdRun.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MpUXSrv.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MSASCui.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe

5. Delete all the infected files

%AppData%\<random>.exe

%CommonAppData%\<random>.exe

C:\Windows\Temp\<random>.exe

%temp%\<random>.exe

C:\Program Files\<random>

6.  Reset your browsers to clear your internet history records, internet temp files and cookies

Internet Explorer:

• Open Internet Explorer, click the gear icon > Internet options. 
• Go to the Advanced tab, click the Reset button > Reset Internet Explorer settings > Delete personal settings > click on Reset option. 
• Click Close and OK to save the changes.

Mozilla Firefox:

• Open Mozilla Firefox, go to the Help section > Troubleshooting Information. 
• Select Reset Firefox and click Finish.

Google Chrome:

• Click the Chrome menu button, select Tools > Extensions, find unknown extension and remove them by clicking Recycle bin. 
• Click Settings > Show Advanced settings > Reset browser settings and click Reset.

7. Restart your computer to make changes

- Want a Quicker Way to resolve it?
- Download Recommended Security Tool to fix the issue.

Solution B: Automatically Remove ShellExecuteEx failed code1203

1. Remove existing viruses using SpyHunter

What can SpyHunter do for you?

• Give your PC intuitive real-time protection.
• Detect, remove and block spyware, rootkits, adware, keyloggers, cookies, trojans, worms and other types of malware.
• Spyware HelpDesk generates free custom malware fixes specific to your PC
• Allow you to restore backed up objects.

1) Click the below button to FREE download SpyHunter.

2)  Click "Run" to install SpyHunter and finish the installation step by step.

3) After the installation is complete, open SpyHunter and click "Scan Computer Now!" to start a scan on your computer.

4) When the scan is done, you can see that all the threats are successfully detected. Then click "Fix Threats" button to clean your computer.



Note: SpyHunter's free version is only for malware detection. To remove the malware threats on your PC, you will need to purchase SpyHunter's malware removal tool.


2. Fix ShellExecuteEx failed code1203 issue with RegCure Pro

What can RegCure Pro do for you?

• Fix system errors
• Remove malware
• Improve startup
• Defrag memory
• Clean up your PC

1) Click the below button to FREE download RegCure Pro.

2) Double click on its application and click the "Yes" button to install the program step by step.

3) After the installation is complete, open the program and scan your system for unnecessary files and invalid registry entries. That will take some time for the first scanning. Please wait while the program scans your system for performance problems.

4) When the System Scan is done, click "Fix All" button to correct all the security risks and potential causes of your computer slow performance.

In Conclusion:

The ShellExecuteEx failed code1203 issue should be resolved immediately in order to save the system from further damages.

Download SpyHunter to remove any malicious virus.

Download RegCure Pro to fix the ShellExecuteEx failed code1203 issue easily.