# Can't update/install version 4.10.2/4.11 R-1638 **URL:** \ **Category:** World Creation\ **Tags:** unreal-engine, UE4, question\ **Created:** [January 24, 2016, 9:43pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210 "2016-01-24T21:43:18Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Drakgoku](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/drakgoku/32/969449_2.png) [@Drakgoku](https://forums.unrealengine.com/u/Drakgoku)\ **Post date:** [January 24, 2016, 9:43pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/1 "2016-01-24T21:43:18Z")
I have Windows 10 pro x64, updated and tried to follow the footsteps of the removal of the “redistributables-\> vc ++ 2015,” but nothing works. I searched > **[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 — ue4community.wiki! You will be able to find content from the official... [https://www.google.es/search?q=VS+2015+C%2B%2B+redistributable+x64&oq=VS+2015+C%2B%2B+redistributable+x64&aqs=chrome..69i57.528j0j7&sourceid=chrome&es\_sm=122&ie=UTF-8#q=unreal+engine+R-1638&tbs=qdr:y](https://www.google.es/search?q=VS+2015+C%2B%2B+redistributable+x64&oq=VS+2015+C%2B%2B+redistributable+x64&aqs=chrome..69i57.528j0j7&sourceid=chrome&es_sm=122&ie=UTF-8#q=unreal+engine+R-1638&tbs=qdr:y) ---
**Author:** ![anonymous\_user\_41845f4a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_41845f4a](https://forums.unrealengine.com/u/anonymous_user_41845f4a)\ **Post date:** [January 25, 2016, 4:13pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/2 "2016-01-25T16:13:48Z")
Hello Drakgoku, Are you only having problems updating to one of the 4.10 hotfixes or are you also having issues installing 4.11 Preview? In the case of the former, there is a bug already in our system for this and another user has been able to find a workaround for the issue that involves removing the UE4 prerequisites from the 4.11 Preview install. > **[We need clear guidelines to solve 4.10 installation errors](https://forums.unrealengine.com/questions/352600/we-need-clear-guidelines-to-solve-410-installation.html)** > > I have the error code 1638 when I try to update my 4.10.0 to 4.10.1. (at first I got another error code but now its always 1638). I already did and try the many “solutions” suggested here & there but I’m still stuck with this error. Windows 7... You can find it in the comments on the accepted answer. ---
**Author:** ![Drakgoku](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/drakgoku/32/969449_2.png) [@Drakgoku](https://forums.unrealengine.com/u/Drakgoku)\ **Post date:** [January 25, 2016, 7:24pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/3 "2016-01-25T19:24:07Z")
Why resolve my post ? not work, I uninstalled all and not work 😉 ---
**Author:** ![anonymous\_user\_41845f4a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_41845f4a](https://forums.unrealengine.com/u/anonymous_user_41845f4a)\ **Post date:** [January 25, 2016, 7:34pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/4 "2016-01-25T19:34:20Z")
When staff members leave answers, they’re automatically resolved for tracking purposes so that we know when you leave a response. You’ve stated that you’ve removed the VS C++ 2015 redistributables but what did you uninstall exactly? Uninstalling the 4.11 engine will not remove the prerequisites. You’ll need to navigate to the 4.11 engine’s installation directory and uninstall them directly. They can be found at C:\Program Files\Epic Games\4.11\Engine\Extras\Redist\en-us if you’re using the default installation location. If you run the UE4PrereqSetup\_x64.exe and choose Uninstall it should remove them. If you have uninstalled 4.11 already, you may need to reinstall it for this file to be available. ---
**Author:** ![Drakgoku](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/drakgoku/32/969449_2.png) [@Drakgoku](https://forums.unrealengine.com/u/Drakgoku)\ **Post date:** [January 25, 2016, 8:06pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/5 "2016-01-25T20:06:36Z")
I tried 5 times 😉 (I love destroy register from windows!) I uninstall V10 v11 also and uninstall VS 2015 C ++ X32 / 64. then I uninstalled the “Unreal Engine” I searched in c: / “everything related to unreal” removed And it so happens that does not work;) I’ve only tried it on my Windows 10 pro Unreal engine need fix this error ---
**Author:** ![anonymous\_user\_41845f4a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_41845f4a](https://forums.unrealengine.com/u/anonymous_user_41845f4a)\ **Post date:** [January 25, 2016, 8:17pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/6 "2016-01-25T20:17:47Z")
Please try following these steps and let me know what the results are: 1. Reinstall 4.11 Preview through the Epic Games Launcher 2. Navigate to 4.11’s installation location (C:\Program Files\Epic Games\4.11 by default) and then find the UE4PrereqSetup\_x64.exe file (should be located under Engine\Extras\Redist\en-us) 3. Run the UE4PrereqSetup\_x64.exe file and select the “Uninstall” option. 4. Once that completes, try to install 4.10.2 through the Epic Games Launcher. ---
**Author:** ![Drakgoku](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/drakgoku/32/969449_2.png) [@Drakgoku](https://forums.unrealengine.com/u/Drakgoku)\ **Post date:** [January 25, 2016, 9:11pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/7 "2016-01-25T21:11:23Z")
I get error : This is log : link text ---
**Author:** ![anonymous\_user\_41845f4a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_41845f4a](https://forums.unrealengine.com/u/anonymous_user_41845f4a)\ **Post date:** [January 25, 2016, 9:19pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/8 "2016-01-25T21:19:07Z")
You’re running the UE4PrereqSetup\_x64.exe inside of your 4.10 installation folder, not the 4.11. You need to run the one in the 4.11 installation directory to uninstall it and then attempt updating 4.10. ---
**Author:** ![Drakgoku](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/drakgoku/32/969449_2.png) [@Drakgoku](https://forums.unrealengine.com/u/Drakgoku)\ **Post date:** [January 25, 2016, 10:39pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/9 "2016-01-25T22:39:16Z")
pfff so really nice, awesome… @ you save my day and my hours ;), Can you tell me why engine detect only last prerequisites and not the normal ? ---
**Author:** ![anonymous\_user\_41845f4a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_41845f4a](https://forums.unrealengine.com/u/anonymous_user_41845f4a)\ **Post date:** [January 26, 2016, 1:18pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/10 "2016-01-26T13:18:03Z")
I don’t understand what you mean. The current bug that is causing this is due to the 4.11 prerequisites being installed when the launcher tries to install the 4.10.1 or 4.10.2 prerequisites. Instead of installing them separately, it tries to install over the 4.11 ones but cannot due to it being a newer version. ---
**Author:** ![num3ric](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@num3ric](https://forums.unrealengine.com/u/num3ric)\ **Post date:** [January 31, 2016, 9:55pm UTC](https://forums.unrealengine.com/t/cant-update-install-version-4-10-2-4-11-r-1638/345210/11 "2016-01-31T21:55:17Z")
I lost 1-2 days on this issue! THANK YOU!