# 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:** 3
**Author:** ![anonymous\_user\_0837b42c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0837b42c1](https://forums.unrealengine.com/u/anonymous_user_0837b42c1)\ **Post date:** [April 7, 2014, 4:11pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/41 "2014-04-07T16:11:49Z")
There are a few issues reported in your log, one that interests me most at moment is this: ``` [E] MSVCR120.DLL ``` This means that there was an error installing Microsoft Visual C++ Redistributable Packages for Visual Studio 2013. answer has a link to this redist and describes how to uninstall then reinstall it to fix issue: > “You can find it here: [http://www.microsoft.com/en-us/download/details.aspx?id=40784](http://www.microsoft.com/en-us/download/details.aspx?id=40784). You should check Add/Remove programs to see if there’s another version listed there and uninstall that first. Thanks again!” If that doesn’t work, you’ll have to try backing up msvcr120.dll in your c:\windows\ system32 folder, deleting original, and then running Visual C++ Redistributable installer again. ---
**Author:** ![lordxizor](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@lordxizor](https://forums.unrealengine.com/u/lordxizor)\ **Post date:** [April 7, 2014, 4:20pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/42 "2014-04-07T16:20:38Z")
I’ve already fixed it before your answer installing vs\_professional.exe , thanks for help anyway ---
**Author:** ![Dralex789](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Dralex789](https://forums.unrealengine.com/u/Dralex789)\ **Post date:** [April 9, 2014, 9:25pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/43 "2014-04-09T21:25:59Z")
Hey guys, I just ran into this with dealing with packaged builds. I tried every solution here and it did not work, but I did finally fix it. I was running a Ship build (32-bit) executable on a 64 bit machine which was causing same error to pop up (after originally replacing specific missing DLL files) Here is what I did. -I ran dwalker.exe and found that both MSVCP120.dll and MSVCR120.dll were having problems so I uninstalled 2013 Visual studio Redistributables both 64 and 32 bit (I had both installed) -I then deleted both DLL files from windows/system32 folder (you guys should back them up\_ -Then reinstalled both to see if they would replace missing DLL file (they didn’t) -I then ran repair of 64 bit one -problem fixed Hope that helps someone! very frustrating, has me concerned for distribution when time comes (as someone who is super new to this) ---
**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:** [April 11, 2014, 4:44am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/44 "2014-04-11T04:44:12Z")
Ok, finally getting time to try to deal with this. This is nuts! Thanks for heads up , I’m going to try your suggestion cause it’s most recent. This is crazy. ---
**Author:** ![Dralex789](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Dralex789](https://forums.unrealengine.com/u/Dralex789)\ **Post date:** [April 11, 2014, 5:16pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/45 "2014-04-11T17:16:58Z")
No worries man, let me know if it works (I’ll stay active on here so maybe if ■■■■ goes wrong I can lend more of a hand). Did you run Dwalker ? ---
**Author:** ![Blakey876\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Blakey876\_1](https://forums.unrealengine.com/u/Blakey876_1)\ **Post date:** [April 25, 2014, 10:42am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/46 "2014-04-25T10:42:29Z")
Huge problems with mine. Same error and I have tried everything. I have attached my dependency log file hope someone can help me Thanks. link text ---
**Author:** ![kingmicka\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@kingmicka\_1](https://forums.unrealengine.com/u/kingmicka_1)\ **Post date:** [April 28, 2014, 3:28pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/47 "2014-04-28T15:28:07Z")
Thanks a lot it works, i used dependancy walker to launch unreal, and my problem was msvcr120.dll who was x86, i replace it by 64b version and works fine. finally ouf…was ready to reinstall my pc 🙂 ---
**Author:** ![Kaninslaktaren](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Kaninslaktaren](https://forums.unrealengine.com/u/Kaninslaktaren)\ **Post date:** [May 2, 2014, 10:18am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/48 "2014-05-02T10:18:17Z")
i dont get it, here is **[log](http://pastebin.com/5TpTpSTH)**, would love if someone could help me with it ---
**Author:** ![anonymous\_user\_0837b42c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0837b42c1](https://forums.unrealengine.com/u/anonymous_user_0837b42c1)\ **Post date:** [May 2, 2014, 3:27pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/49 "2014-05-02T15:27:59Z")
@Kaninslaktaren, It looks like it is having difficulty loading everything out of your c:\windows\system32 folder. If you look at output, you can see it is not able to load every file with a [E] in front of it(there are a ton). I can’t tell if this is because you are using 32 bit version of DependencyWalker or if it is because there is a legitimate problem with that folder. Perhaps you could use 64bit version of DependencyWalker to see if it gives more reasonable output. ---
**Author:** ![BenGe89](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BenGe89](https://forums.unrealengine.com/u/BenGe89)\ **Post date:** [May 3, 2014, 2:39pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/50 "2014-05-03T14:39:16Z")
I’m also having problems understanding log, would you take a look at mine too link text? Thanks! ---
**Author:** ![anonymous\_user\_0837b42c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0837b42c1](https://forums.unrealengine.com/u/anonymous_user_0837b42c1)\ **Post date:** [May 5, 2014, 7:07pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/51 "2014-05-05T19:07:05Z")
@BenGe89, your log shows that you have an x86 version of following file in your system32 folder: c:\windows\system32\XAPOFX1\_5.DLL. If I’m not mistaken, this is one of DirectX DLLs. Backup(rename) that dll and install/repair DirectX again. ---
**Author:** ![Kaninslaktaren](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Kaninslaktaren](https://forums.unrealengine.com/u/Kaninslaktaren)\ **Post date:** [May 6, 2014, 1:52pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/52 "2014-05-06T13:52:15Z")
@DEADBEEF, Thanks for help. Fixed my problem for my desktop computer. But i cant seem to get it on to my Laptop , _**[LOG](http://pastebin.com/70azwM4K)**_ ---
**Author:** ![anonymous\_user\_0837b42c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0837b42c1](https://forums.unrealengine.com/u/anonymous_user_0837b42c1)\ **Post date:** [May 6, 2014, 2:42pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/53 "2014-05-06T14:42:12Z")
This is what I saw in your log: [E] c:\windows\system32\MSVCR120.DLL This means that Visual C++ Redistributable Packages for Visual Studio 2013 is not installed properly. - Go to this link and get vcredist\_x64.exe: - Backup(Rename) c:\windows\system32\MSVCR120.DLL - Run vcredist\_x64.exe and select repair (You could also uninstall/install if you prefer) - Make sure a new copy of c:\windows\system32\MSVCR120.DLL is added ---
**Author:** ![Kaninslaktaren](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Kaninslaktaren](https://forums.unrealengine.com/u/Kaninslaktaren)\ **Post date:** [May 7, 2014, 9:00am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/54 "2014-05-07T09:00:35Z")
@0xDEADBEEF Thank you so much ^^ it runs like a water in river 🙂 ---
**Author:** ![hotyves](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@hotyves](https://forums.unrealengine.com/u/hotyves)\ **Post date:** [May 26, 2014, 3:08am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/55 "2014-05-26T03:08:08Z")
I got this error too wiht some games and software so here its my log!..link text ---
**Author:** ![Stephen\_Ellis](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephen_ellis/32/1210665_2.png) [@Stephen\_Ellis](https://forums.unrealengine.com/u/Stephen_Ellis)\ **Post date:** [May 28, 2014, 9:10pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/56 "2014-05-28T21:10:39Z")
Hi hotyves, Your errors seem to be generated for when you are running a Ubisoft product (Flashback.exe). This site is only for support of Unreal Engine 4, and your issue is outside scope of support we can offer. I recommend for help on support site for product you are using. Cheers ---
**Author:** ![swordmac](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@swordmac](https://forums.unrealengine.com/u/swordmac)\ **Post date:** [July 7, 2014, 2:33am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/57 "2014-07-07T02:33:28Z")
here’s my log btw its for visual studio cause its whats giving me problems: log.txt ---
**Author:** ![anonymous\_user\_0837b42c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0837b42c1](https://forums.unrealengine.com/u/anonymous_user_0837b42c1)\ **Post date:** [July 8, 2014, 5:04pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/58 "2014-07-08T17:04:07Z")
According to your log, your Kernel32.dll files are being detected as 32bit. This may seem counter intuitive but 64bit version of windows should have a 64bit version of this file: c:\windows\system32\KERNEL32.DLL. Your version is 32bit and I’m not sure how you got into that state. In fact, all files in windows\system32 folder should be 64 bit. ---
**Author:** ![anonymous\_user\_5407ea8c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_5407ea8c](https://forums.unrealengine.com/u/anonymous_user_5407ea8c)\ **Post date:** [July 20, 2014, 7:30am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/59 "2014-07-20T07:30:24Z")
Repairing 2013 _and_ 2012 worked for me. 🙂 ---
**Author:** ![swordmac](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@swordmac](https://forums.unrealengine.com/u/swordmac)\ **Post date:** [July 21, 2014, 11:13pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/60 "2014-07-21T23:13:02Z")
so is there anything i can do to fix it? [Previous page](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486.md?page=2) [Next page](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486.md?page=4)