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I am on Windows 7 x64, trying to install Python 2.7.5 or 3.3.2. But I'm continuously getting an error showing : "There is a Problem with this windows installer package. A DLL required for this install to complete could not be run. Contact your package vendor. "

I have freshly downloaded the installer package from for several times but it is giving the same error repeatedly. Please help !

I am also attaching a picture of the error message as it appears while installing.enter image description here

Thank you for your kind concern.!

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migrated from Jun 30 '13 at 12:58

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Yes !!! that did work good.. Thank you very much for this info. but it led me into another Question that why am I not being able to access the installer as administrator while I am logging in as an administrator ? I don't understand ! – abhisek Jun 30 '13 at 9:05
up vote 4 down vote accepted

I think this might work:

  • Go to C:/Users/XXX/AppData/Local/Temp or simply %LocalAppData%/Temp.
  • Go to Properties.
  • Change permission level for everyone to FULL ACCESS.
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ya! it worked for me. But can you explain why does that happened. I am logged in as the administrator but still why ? – abhisek Jun 30 '13 at 9:19
Maybe the installer doesn't have the right privileges? Mind you, the privilege system in Windows is really weird. – Farid Jun 30 '13 at 9:41
yah! i agree too... @Farid – abhisek Jun 30 '13 at 12:32
This didn't work for me though the symptoms were similar. Turned out to be a conflicting PIP install. This fixed me: – Jagu Dec 16 '14 at 10:21
Note that "%temp%" is a shortcut to that location. – phk Nov 17 '15 at 11:41
  • Run cmd.exe (run as administrator)

  • Go to Python's location (example: D:\python\) by changing the directory

  • Write msiexec /i filename.msi, e.g. msiexec /i python-3.4.1.amd64.msi

  • Then Enter

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I was just trying to install 32 bit version on x64. Tried again with correct version and problem solved.

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Can you please provide more details. One line answer do not count as good one. – Romeo Ninov Mar 7 at 6:51

I had extraneous Python environment variables from previous installations. You should delete any Python environment variables and retry.

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