# Error when trying to install JuMP (or any package)

**URL:** https://discourse.julialang.org/t/error-when-trying-to-install-jump-or-any-package/45713
**Category:** General Usage
**Tags:** package, jump
**Created:** [August 28, 2020, 10:32pm UTC](https://discourse.julialang.org/t/error-when-trying-to-install-jump-or-any-package/45713 "2020-08-28T22:32:22Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Eugenio\_Fischetti](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/eugenio_fischetti/32/17546_2.png) [@Eugenio\_Fischetti](https://discourse.julialang.org/u/Eugenio_Fischetti)
#### Post date: [August 28, 2020, 10:32pm UTC](https://discourse.julialang.org/t/error-when-trying-to-install-jump-or-any-package/45713/1 "2020-08-28T22:32:22Z")

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Hello there!

I have Julia 1.5.1 on Windows 7.  
When installing JuMP i get the following error, below:

 ![Julia error](https://global.discourse-cdn.com/julialang/original/3X/a/1/a12895749883b3676359a64b64e895a16b67b382.png)

Anyone can help me, please?

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### Author: ![anon37204545](https://avatars.discourse-cdn.com/v4/letter/a/439d5e/32.png) [@anon37204545](https://discourse.julialang.org/u/anon37204545)
#### Post date: [August 28, 2020, 11:48pm UTC](https://discourse.julialang.org/t/error-when-trying-to-install-jump-or-any-package/45713/2 "2020-08-28T23:48:14Z")

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I don’t speak Spanish, but it seems like a security error. It’s possible that Windows Defender or another security tool blocked `julia.exe` from accessing the network. Can you check that?

As a standard method, did you try deleting `.julia` folder?

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### Author: ![Eugenio\_Fischetti](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/eugenio_fischetti/32/17546_2.png) [@Eugenio\_Fischetti](https://discourse.julialang.org/u/Eugenio_Fischetti)
#### Post date: [August 29, 2020, 4:51pm UTC](https://discourse.julialang.org/t/error-when-trying-to-install-jump-or-any-package/45713/3 "2020-08-29T16:51:04Z")

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Thanks for your answer,

I checked that. Deactivated my security program but the problem continues.  
I have also tried to uninstall and install Julia and nothing happened.

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<div class="post-metadata">

### Author: ![Eugenio\_Fischetti](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/eugenio_fischetti/32/17546_2.png) [@Eugenio\_Fischetti](https://discourse.julialang.org/u/Eugenio_Fischetti)
#### Post date: [August 31, 2020, 11:40pm UTC](https://discourse.julialang.org/t/error-when-trying-to-install-jump-or-any-package/45713/4 "2020-08-31T23:40:36Z")

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Sorted out.

The problem was solved with the installation of PowerShell 3, according to [Problems with CodecZlib - #4 by jacobcvt12](https://discourse.julialang.org/t/problems-with-codeczlib/10124/4)