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I recently installed SIMATIC STEP 7-Micro/WIN V4.0.8.06 but cancelled the installation after some steps.

But the program appears in the control panel and when I try to uninstall it, the error:- "Did not find Shared Comm client list in registry at:....." appears and the unistallation process terminates.

I also tried to uninstall the registry entries by opening "HKEY_LOCAL_MACHINE > SOFTWARE" directory. Still it won't uninstall.

Please help!!

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Your best bet, if Control Panel/Add or Remove programs isn't working, is to navigate to your STEP 7 Micro/WIN directory in the Windows Explorer and delete it (default directory: C:\Program Files\Siemens\STEP 7 MicroWIN V4.0).

To remove the registry items associated with STEP 7:

Go to: HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ Uninstall.

Click the Uninstall folder and go to Edit > Find

Enter: STEP 7 Micro/WIN

Check whether the DisplayName code matches one of the "MicroWin Release" versions i.e. V4.0.8.06. Delete the corresponding folder...

Refer to this document for help.

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