# Unreal Engine won't launch Error code (0xc000007b) **URL:** \ **Category:** Getting Started & Setup\ **Tags:** error, unreal-engine, Installation, question\ **Created:** [March 20, 2014, 6:27am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486 "2014-03-20T06:27:08Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 20, 2014, 6:27am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/1 "2014-03-20T06:27:08Z")
I install Unreal Engine but when I launch it, it said Application was unable to start properly. It seems I only get 64bits version of launcher. While my comp is 64 bits, it usually can only run 32bits program. Any thought on that? I have try to re install program 5 times by way. ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 20, 2014, 7:09am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/2 "2014-03-20T07:09:09Z")
Anyone else have same problem? ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 20, 2014, 1:43pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/3 "2014-03-20T13:43:21Z")
Hey Egoist, At what point are you getting error? Are you able to open Launcher? If you can open Launcher, click “verify install” below Launch button. It’s possible you will need to redownload and reinstall. What are your machine specs? ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 20, 2014, 2:42pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/4 "2014-03-20T14:42:38Z")
My machine spec is 64 bits, 6 Gig ram with R270x (2gig ram graphic card). I am unable to open Launcher or Crash Report Client, both give me Error code (0xc000007b). I have re install engine 6 times, and try different things, but still stuck with this problem. Is it possible that it has something to do with registry? Thank you for reply. ---
**Author:** ![ShiftyInc\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ShiftyInc\_1](https://forums.unrealengine.com/u/ShiftyInc_1)\ **Post date:** [March 20, 2014, 3:23pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/5 "2014-03-20T15:23:46Z")
I have same error as well. also on a 64 bits system. ---
**Author:** ![Carlos\_Cuello](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Carlos\_Cuello](https://forums.unrealengine.com/u/Carlos_Cuello)\ **Post date:** [March 20, 2014, 4:02pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/6 "2014-03-20T16:02:33Z")
Hi Egoist, can you attach your log and DXDiag? Your logs can be found here: C:\Users(YOURUSERNAME)\AppData\Local\UnrealEngineLauncher\Saved\Logs\ ---
**Author:** ![SXX\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SXX\_1](https://forums.unrealengine.com/u/SXX_1)\ **Post date:** [March 20, 2014, 7:22pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/7 "2014-03-20T19:22:07Z")
This error can as well mean there is corrupt DLL in your system. As example it’s can be incorrect DirectX DLL, so you need go though dependencies, find what cause problem and re-install system component. ---
**Author:** ![ShiftyInc\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ShiftyInc\_1](https://forums.unrealengine.com/u/ShiftyInc_1)\ **Post date:** [March 20, 2014, 7:55pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/8 "2014-03-20T19:55:01Z")
For me it is fixed after replacing following dll files: (mfc100.dll, mfc100u.dll, msvcr100.dll, msvcp100.dll, msvcr100\_clr0400.dll) with new ones on C:\Windows\System32. but when doing so make sure to be in safe mode. ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 21, 2014, 1:47am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/9 "2014-03-21T01:47:11Z")
Hi, actualy Installation program closed when Installing directX. Is installation finish, or it didnt install properly? Is there some kind of Finish button when you finish installing? Because I didn’t get that. Thanks for reply guys. ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 21, 2014, 2:02am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/10 "2014-03-21T02:02:30Z")
Second day still no luck ~\_~ where can I download system32 file? ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 21, 2014, 4:33am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/11 "2014-03-21T04:33:47Z")
link text Here is my DxDiag ---
**Author:** ![anonymous\_user\_92e929a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_92e929a51](https://forums.unrealengine.com/u/anonymous_user_92e929a51)\ **Post date:** [March 21, 2014, 4:39am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/12 "2014-03-21T04:39:59Z")
can you perhaps spell that out for those of us slightly less computer savvy. I also can’t get past installer… ---
**Author:** ![anonymous\_user\_92e929a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_92e929a51](https://forums.unrealengine.com/u/anonymous_user_92e929a51)\ **Post date:** [March 21, 2014, 4:43am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/13 "2014-03-21T04:43:38Z")
Also on my second day hoping for a bit more of help or perhaps just a heads up on whether or not things are just buggy right now and I should check back in a few days… ---
**Author:** ![ShiftyInc\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ShiftyInc\_1](https://forums.unrealengine.com/u/ShiftyInc_1)\ **Post date:** [March 21, 2014, 8:30am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/14 "2014-03-21T08:30:27Z")
This solution only works for a 64-bit system. It requires replacing files in system32 directory so be careful. Only attempt this solution if you are confident. Firstly download file and decompress it. Reboot in safe mode and go to C:\Windows\System32. copy all files included in package (mfc100.dll, mfc100u.dll, msvcr100.dll, msvcp100.dll and msvcr100\_clr0400.dll) to C:\Windows\System32 replacing current ones. After that reboot in normal mode. ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 21, 2014, 2:12pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/15 "2014-03-21T14:12:51Z")
Still stuck with Error code (0xc000007b) =(. My bro can run it just fine in his comp. Im so jelly now. I been waiting for UE4 for few years =(. ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 21, 2014, 2:21pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/16 "2014-03-21T14:21:59Z")
link text Here you go, hope it give you some clue. ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 21, 2014, 3:01pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/17 "2014-03-21T15:01:36Z")
Did it, and still not working. Guess is not DX related problem =( ---
**Author:** ![Carlos\_Cuello](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Carlos\_Cuello](https://forums.unrealengine.com/u/Carlos_Cuello)\ **Post date:** [March 21, 2014, 10:14pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/18 "2014-03-21T22:14:01Z")
Hi EGOiST, there actually isn’t a “Finish” button, once installer finishes installation it automatically opens up Launcher. Does launcher work properly, and you crash when opening an installed version of edtior? Or does launcher itself crash? ---
**Author:** ![Carlos\_Cuello](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Carlos\_Cuello](https://forums.unrealengine.com/u/Carlos_Cuello)\ **Post date:** [March 21, 2014, 10:52pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/19 "2014-03-21T22:52:58Z")
Sorry, noticed in other comment that you aren’t even able to run launcher. Can you one more thing: - Re-install visual studio redistributable: [http://www.microsoft.com/en-us/download/details.aspx?id=40784](http://www.microsoft.com/en-us/download/details.aspx?id=40784) (make sure to download and install 64bit version) Carlos ---
**Author:** ![EGOiST](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EGOiST](https://forums.unrealengine.com/u/EGOiST)\ **Post date:** [March 22, 2014, 12:19am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/20 "2014-03-22T00:19:28Z")
Hi Carlos, thanks for quick reply. I will try it and notify u. [Next page](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486.md?page=2)