Thnx, Nice Job, I just needed turn on win update and install that. 
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For win7 and play sc2: Go on C:\Program Files (x86)\StarCraft II\support64 and login by SC2Switcher_x64.exe
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Thank You! it work for me windows7
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I got WIN10 with latest updates and I’m unable to install the game (W3) because the first thing what is installer trying to do is install/update battle.net client which always ends up with “A required DLL could not be found”. Doesn’t even proceed to install the game. This is beyond annoying now.
Confirmed, this does work!
Use SATURAS link above for Windows 7 64-bit update.
For Windows 7 32-bit I found this link in Google (hopefully it works too, I couldn’t check, i’m on 64-bit).
https://www.microsoft.com/en-us/download/details.aspx?id=45588
Or just use link to older folder version. Shlashlick provided a link above.
But if you are lazy, I will paste the link here as well. Here it is:
https://www.mediafire.com/file/2op97srx95eut4a/Battle.net.13401.zip/file
“Battle.net.13365” - As an alternative I decided to provide a link to another, earlier folder version.
https://www.mediafire.com/file/ei5bf2dmg4k4zw4/Battle.net.13365.zip/file
IMPORTANT - Remember to delete “Battle.net.13434” (or any other similar folders Battle.net.#####).
Battle Net recreates “Battle.net.13434” folder EVERY TIME after successful login.
So with this temporary workaround you will have to delete “Battle.net.13434” before every Battle Net start.
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For those still having this issue… see Blizzard’s request for data here:
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Hi. I have the same problem on win 7 but on win 8.1 there is no problem and battle.net is working properly.
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i’m not a programmer and my CPU is getting old … but i actually read this and deleted 13434 and now i’m able to log in. thank you.
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This is working! thanks!!! Win 10 User
DLL manquante, idem je suis sous windows 7. Je jouais hier nikel et le bugg apparait dans la soiree. Le probleme viens surement de l installation de ce patch. Blibli ce n est pas de notre faute, mais au contraire de VOTRE faute. Bref en attendant qu un bleu nous apporte une solution svp
Now it seems that there is a problem with their own client. If they replace 13434, there will be no problem. They need to fix the problem, but Blizzard ignores it
There are links provided by friends on the upper floor，Download the file in the link and replace the 13434 folder, there will be no problem that the DLL is missing and cannot be started
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pues yo ya intente de todo no funciona sumpogo que a esperar que haya otra actualizacion que corriga el error oir que no hay solucion
Saturas Thank you so much this worked just fine was able to reload my games as well as Battle.net
You were more helpful than any of the genius at Battle net or Blizzard who I have yet to see one mention or reply of this issue.
Thank you again my friend. 
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Thanks, but the real hero is Akute from the repost. 
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Thanks! It work for me also on win7 64bit. I used this cause the windows 7 patch linked by SATURAS didn’t work on my win7 64 bit, I don’t know why…
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idem pour moi windws 7, grosse mauvaise pub pour bilzzard. En espérant qu ils vons nous trouver uns solution car je veut rejouer à mon jeu favori
NB : j ai désinstallé
@Magikeur : Bonjour,
As-tu essayé d’installer les patches de Windows 7 : [Main Thread] Can't launch the Battle.net App - DLL error - #114 by Boubou-1741
Si ça ne fonctionne pas, je t’encourage à envoyer tes enregistrements de Battle.Net tel que demandé ici : [Main Thread] Can't launch the Battle.net App - DLL error - #102
Bonne chance !
Actually worked - thanks!
yop boubou, je n ai pas essayé d autres pachs pour windows 7 car je ne les possede pas. En revanche j ai desinstallé puis réinstallé battle.net et ça ne change rien =’(