Python installer: "A DLL required for this install to complete could not be run"

Question

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 Python.org several times but it is giving the same error repeatedly.

Here is a picture of the error message as it appears while installing:

Answer 1

I think this might work:

• Go to C:/Users/XXX/AppData/Local/Temp or simply %LocalAppData%/Temp.
• Go to Properties → Security
• Change permission level for everyone to FULL ACCESS.

Answer 2

• 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

Answer 3

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

Answer 4

I installed an older version (Python 3.4.3) and it worked fine.

See the old releases here: https://www.python.org/downloads/

(Fully updated Windows 8.1 64-bit PC, and I tried several of the newer versions, none worked. I also ran a Virus scan, and disabled Antivirus, same error.)

Answer 5

%temp% on run window then Go after That Temp folder - Go to organize- propertiese - share - everyone .Then again Run installation it will work100%

Answer 6

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

The automatic download I was given for Windows was the 32-bit version, not the 64-bit version. I scrolled down through all the releases, found 2.7.13 (most recent version as of 10/Aug/17), and specifically downloaded the 64-bit version;

Once I had downloaded the 64-bit version I installed with no issues.