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Since my last Windows update there were some features added to the command prompt cmd but autocomplete doesn't work anymore it only inserts a TAB character, does anyone experienced this behavior or knows how to fix it, it's annoying, thanks for any help.

I am using Windows 10 (10.0.18362.239) and the installed patches are KB4506991 and KB4507453.

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  • You will have to be more specific. Which cumulative updatedid you install exactly? What version of Windows 10 are you running? What features were added exactly? Please edit your question instead of replying with a comment – Ramhound Jul 11 at 20:52
  • Hi @Ramhound I have added more info – JM_dash Jul 11 at 21:56
  • KB4506991 is a .NET Framework patch, if these issues were introduced due to that patch, you should simply remove the patch. Have you tried to verify if the behavior exhibits itself without the patch in question? – Ramhound Jul 11 at 22:35
  • Why did you remove which patch you installed from your question body, that was important information, that you removed? – Ramhound Jul 11 at 23:12
  • @Ramhound I am not sure this patch caused the problem there were about three patches I will post those ones – JM_dash Jul 11 at 23:17
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After some digging I found that I was missing a key in my registry that contains this settings. I don't know what caused the deletion of this key, the key was HKEY_CURRENT_USER\Software\Microsoft\Command Processor.

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  • If you were missing the root HKEY_CURRENT_USER\Software\Microsoft\Command Processor key then you didn't have any of the subkeys. You basically did not have command interpreterSource – Ramhound Jul 12 at 0:53

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