**I do not remember exactly what modification I did on my computer, but when I tried to open the UE4 the following error appeared:**

[![enter image description here][1]][1]

*(image taken from the internet)*

It is not the first time that this error occurs, but there I went to solve it again (If I remember correctly I deleted the folder with the libraries (.dll) that resolved it the first time, so I had to download it again):

But before, a poetic pause... One day Albert Einstein said: ***Insanity is to keep doing the same thing and expect different results***.

So this time I looked for another place to try to solve this error, :

(**VIDEO LINK**) => https://www.youtube.com/watch?v=kA4N0x4iG54

In this video the man orders to download a compressed file that contains three folders.

(**COMPRESSED FILE**) => http://www.mediafire.com/file/at50mz3rkobxe4i/Erro+0xc000007b.rar

You should copy all libraries from the first folder and paste them into the sytem32 folder (if your system is 32-bit) and the system32 and SysWOW64 folders (if your system is 64-bit).

**Your pasting must be of the type that replaces existing files:**

[![enter image description here][2]][2]

**You will need to give administrator permission for the computer to do this:**

[![enter image description here][3]][3]

**There will be an "error", you select the "do this for all current items" box and then click ignore:**

[![enter image description here][4]][4]

**Once you click Ignore you will notice that there are numerous selected files. Press the delete key and enter to delete them (again you will have to provide administrator permission):**

[![enter image description here][5]][5]

NOTE => **For users of a 64-bit computer, you will have to do this in both folders (system32 and SysWOW64).**

In the second folder of the file that the video man made available has the directX installer. **I RECOMMEND NOT TO USE, BECAUSE WITH ME IT DID NOT WORK.** I even had to reinstall directX.

(**OFICIAL LINK OF DIRECTX**) => https://support.microsoft.com/pt-br/help/179113/how-to-install-the-latest-version-of-directx

**Just install DirectX.**

In the third folder of the file that the video man provided, there is another installer (all versions of Visual Studio) that also did not work for me.

(**OFICIAL LINK 64-bit**) => https://www.microsoft.com/pt-br/download/confirmation.aspx?id=36805

*Sorry, I downloaded 32-bit too, but I can not find the link.*

**Just install all versions of Visual Studio from Microsoft.**

The video man also provides a link so you can download the three folders separately, so you only need to download the first folder: http://bit.ly/2CI3kse

That way I killed two birds with one stone.

**The lighting build works and the error has been fixed.**

  [1]: https://i.sstatic.net/6ANh1.png
  [2]: https://i.sstatic.net/onsyz.png
  [3]: https://i.sstatic.net/P4TqE.png
  [4]: https://i.sstatic.net/1Zr5t.png
  [5]: https://i.sstatic.net/13cre.png