# I can't install UE4. Error code: R-1638. I deleted Mincrosoft Visial C ++ 2015. I reinstalled the launcher. Nothing happens. Why? **URL:** \ **Category:** Platform & Builds\ **Tags:** unreal-engine, question\ **Created:** [January 29, 2016, 8:40pm UTC](https://forums.unrealengine.com/t/i-cant-install-ue4-error-code-r-1638-i-deleted-mincrosoft-visial-c-2015-i-reinstalled-the-launcher-nothing-happens-why/345802 "2016-01-29T20:40:45Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Max1511](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Max1511](https://forums.unrealengine.com/u/Max1511)\ **Post date:** [January 29, 2016, 8:40pm UTC](https://forums.unrealengine.com/t/i-cant-install-ue4-error-code-r-1638-i-deleted-mincrosoft-visial-c-2015-i-reinstalled-the-launcher-nothing-happens-why/345802/1 "2016-01-29T20:40:45Z")
I can’t install Unreal Engine 4.10.2. Error code: R-1638. I deleted Mincrosoft Visial C ++ 2015. I reinstalled the launcher. Nothing happens. ---
**Author:** ![anonymous\_user\_ebb22d8c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_ebb22d8c](https://forums.unrealengine.com/u/anonymous_user_ebb22d8c)\ **Post date:** [February 15, 2016, 12:06am UTC](https://forums.unrealengine.com/t/i-cant-install-ue4-error-code-r-1638-i-deleted-mincrosoft-visial-c-2015-i-reinstalled-the-launcher-nothing-happens-why/345802/3 "2016-02-15T00:06:22Z")
He uninstalled it because of these instructions: > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from... I am running into the same error. ---
**Author:** ![Celesina](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Celesina](https://forums.unrealengine.com/u/Celesina)\ **Post date:** [February 15, 2016, 2:50am UTC](https://forums.unrealengine.com/t/i-cant-install-ue4-error-code-r-1638-i-deleted-mincrosoft-visial-c-2015-i-reinstalled-the-launcher-nothing-happens-why/345802/4 "2016-02-15T02:50:06Z")
Hi according to responses to another question relating to this one, these are some of the recommended steps someone else gave: - uninstall the VS 2015 C++ redistributable x64 and x86, - ran the prerequisites directly through the exe ( as suggested by Alters) - ran Epic Games Launcher which successfully installed 4.10 - finally reinstalled VS 2015 update1 to reinstall the C++ common components. ---
**Author:** ![ModernRyoga](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ModernRyoga](https://forums.unrealengine.com/u/ModernRyoga)\ **Post date:** [February 22, 2016, 10:23pm UTC](https://forums.unrealengine.com/t/i-cant-install-ue4-error-code-r-1638-i-deleted-mincrosoft-visial-c-2015-i-reinstalled-the-launcher-nothing-happens-why/345802/5 "2016-02-22T22:23:05Z")
Hello Max1511, Please try the following: 1. Manually download and install DirectX from here: [Link](https://www.microsoft.com/en-us/download/details.aspx?id=8109) 2. Install [Microsoft Visual C++ 2010 Redistributable Package (x86)](https://www.microsoft.com/en-us/download/details.aspx?id=5555). On 64bit Windows **also** install [Microsoft Visual C++ 2010 Redistributable Package (x64)](https://www.microsoft.com/en-us/download/details.aspx?id=14632) 3. Install [Visual C++ Redistributable for Visual Studio 2012](https://www.microsoft.com/en-nz/download/details.aspx?id=30679). On 32bit Windows install **vcredist\_x86.exe**. On 64bit Windows install both **vcredist\_x86.exe** and **vcredist\_x64.exe**. 4. Install [Visual C++ Redistributable Packages for Visual Studio 2013](https://www.microsoft.com/en-us/download/details.aspx?id=40784). On 32bit Windows install **vcredist\_x86.exe**. On 64bit Windows install both **vcredist\_x86.exe** and **vcredist\_x64.exe**. Start the launcher and attempt to download the engine version of your choice. If this does not resolve the issue, please reply back.