I always get client errors.. 
Could someone help?
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World of WarCraft: Retail Build (build 15595)
Exe: D:\Cataclysm\InfinityWoW.exe
Time: Dec 17, 2016 9:33:51.485 PM
User: Lucas
Computer: DESKTOP-67T2E43
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This application has encountered a critical error:
ERROR #132 (0x85100084) Fatal exception!
Program: D:\Cataclysm\InfinityWoW.exe
ProcessID: 17468
Exception: 0xC0000005 (ACCESS_VIOLATION) at 0023:77AD6D99
The instruction at "0x77AD6D99" referenced memory at "0x00000014".
The memory could not be "written".
WoWBuild: 15595
Version: 4.3.4
Type: WoW
Platform: X86
Patch data download failed.
Error downloading patch data from server 'http://xx.xxx.xxx.xx' , error code : genericError
Manifest is valid.
Could someone help?