WoW cannot authenticate signature file. Launch failure.

Technical Support
Since the patch successfully downloaded I encounter this error all the time. Tried previous solutions to this problem found in the old forums. Created a new administrator account, used windows attrib cmd to remove read only status, checked, created and edited permissions within windows 7 X64 Pro and nothing seems to work. Can't attach the error log file and full log itself is too large.

World of WarCraft: Retail Build (build 13329)
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This application has encountered a critical error:

The operation being requested was not performed because the user has not been authenticated.

Program: G:\World of Warcraft\WoW.exe
File: .\Client.cpp
Line: 3762

Could not authenticate the signaturefile file.
Settings:
SET locale "enGB"
SET patchlist "enGB.patch.battle.net:1119/patch"
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----------------------------------------
Memory Dump
----------------------------------------

Stack: 1024 bytes starting at (ESP = 0037EDA0)

* = addr ** *
0037EDA0: 3C 50 87 01 00 00 00 00 A6 60 27 01 A0 ED 37 00 <P.......`'...7.
0037EDB0: B4 ED 37 00 DC ED 37 00 98 B1 26 01 01 00 6E 00 ..7...7...&...n.
0037EDC0: 50 A4 26 01 50 25 00 00 05 00 00 00 00 00 00 00 P.&.P%..........
0037EDD0: 34 ED 85 01 70 67 64 05 B2 0E 00 00 0C F6 37 00 4...pgd.......7.
0037EDE0: 9F B7 26 01 DC 04 00 00 34 ED 85 01 B2 0E 00 00 ..&.....4.......
0037EDF0: 0C EE 37 00 00 00 00 00 01 00 00 00 02 00 00 00 ..7.............
0037EE00: 11 11 11 11 01 00 00 00 D4 8D 72 03 43 6F 75 6C ..........r.Coul
0037EE10: 64 20 6E 6F 74 20 61 75 74 68 65 6E 74 69 63 61 d not authentica
0037EE20: 74 65 20 74 68 65 20 73 69 67 6E 61 74 75 72 65 te the signature
0037EE30: 66 69 6C 65 20 66 69 6C 65 2E 00 01 FC 00 BB 87 file file.......
0037EE40: FE FF FF FF 39 46 1C 01 8F 7E 26 01 D0 B3 A2 05 ....9F...~&.....
0037EE50: 50 9F 64 05 02 00 00 00 70 EE 37 00 45 10 1B 01 P.d.....p.7.E...
0037EE60: 04 00 00 00 B4 EC 85 01 FF FF FF FF 00 00 00 00 ................
0037EE70: C0 EE 37 00 B4 4F 50 01 D1 4F 50 01 5C 88 67 05 ..7..OP..OP.\.g.
0037EE80: 00 00 00 00 38 F5 85 01 08 00 00 00 E8 4C E6 05 ....8........L..
0037EE90: 38 F5 85 01 00 00 00 00 00 00 00 00 00 00 00 00 8...............
0037EEA0: 00 00 00 00 F4 F3 37 00 0E 00 00 00 00 00 00 00 ......7.........
0037EEB0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0037EEC0: 40 F4 37 00 08 54 50 01 38 F5 85 01 50 9F 64 05 @.7..TP.8...P.d.
0037EED0: 98 F5 37 00 98 5D 84 01 FF FF FF FF 40 F4 37 00 ..7..]......@.7.
0037EEE0: 32 54 50 01 00 00 00 00 34 EF 37 00 94 FC 4B 01 2TP.....4.7...K.
0037EEF0: DC CA 73 03 FC EE 37 01 00 00 00 00 10 00 00 00 ..s...7.........
0037EF00: E8 4C E6 05 00 00 00 00 00 00 00 00 00 00 00 00 .L..............
0037EF10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0037EF20: 20 00 4F 06 00 00 00 00 00 00 00 00 0F 4F 59 00 .O..........OY.
0037EF30: 00 00 00 00 64 F4 37 00 8E 0B 50 01 20 00 4F 06 ....d.7...P. .O.
0037EF40: 00 00 00 00 00 00 00 00 0F 4F 59 00 60 F4 37 00 .........OY.`.7.
0037EF50: 58 88 67 05 00 00 00 00 0F 4F 59 00 00 00 00 00 X.g......OY.....
0037EF60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0037EF70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0037EF80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0037EF90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0037EFA0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0037EFB0: 00 00 00 00 00 00 00 00 00 00 00 00 CC E1 7D 77 ..............}w
0037EFC0: 82 4C AF 77 00 00 58 00 94 01 58 00 00 00 58 00 .L.w..X...X...X.
0037EFD0: 00 00 00 00 67 3A 5C 77 2E 00 22 00 12 00 00 00 ....g:\w..".....
0037EFE0: 00 00 58 00 94 01 58 00 00 00 58 00 61 5C 65 6E ..X...X...X.a\en
0037EFF0: 2F 00 20 00 12 00 00 00 11 00 00 00 2E 77 74 66 /. ..........wtf
0037F000: 58 03 6F 03 00 00 00 00 08 00 00 00 2F 00 1C 00 X.o........./...
0037F010: 00 00 00 00 A8 AE 79 03 48 00 6F 03 5C 01 6F 03 ......y.H.o.\.o.
0037F020: F0 B3 A2 05 D8 03 6F 03 12 00 80 00 C0 EF 37 00 ......o.......7.
0037F030: A8 AE 79 03 C0 F1 37 00 DD 03 82 77 7E 6C E5 00 ..y...7....w~l..
0037F040: FE FF FF FF CC E1 7D 77 32 DF 7D 77 00 00 58 00 ......}w2.}w..X.
0037F050: 08 00 00 00 C8 B3 A2 05 7E 6C E5 00 FE FF FF FF ........~l......
0037F060: CC E1 7D 77 32 DF 7D 77 00 00 58 00 00 00 00 00 ..}w2.}w..X.....
0037F070: 00 00 58 00 D0 B3 A2 05 10 05 6F 03 10 F0 37 00 ..X.......o...7.
0037F080: 2E 00 22 00 12 00 00 00 00 00 00 00 61 00 00 00 ..".........a...
0037F090: 90 C5 A2 05 00 00 58 00 A0 C9 A2 05 98 C5 A2 05 ......X.........
0037F0A0: C0 83 B2 05 B0 CC A2 05 00 00 00 00 00 00 58 00 ..............X.
0037F0B0: A0 C9 A2 05 00 00 00 00 FA 00 00 FA 90 C5 A2 05 ................
0037F0C0: B0 CB A2 05 C0 83 B2 05 88 59 E6 05 D0 03 00 00 .........Y......
0037F0D0: 00 00 58 00 00 00 00 10 98 C8 A2 05 CC F1 37 00 ..X...........7.
0037F0E0: 5E 2E 7E 77 38 01 58 00 3A 2E 7E 77 0A 4D AF 77 ^.~w8.X.:.~w.M.w
0037F0F0: 00 00 00 00 00 00 58 00 A8 C9 A2 05 00 2E 7E 77 ......X.......~w
0037F100: 00 3E 58 00 02 00 00 00 48 00 CF 05 00 00 00 00 .>X.....H.......
0037F110: 82 00 00 00 C0 83 B2 05 00 3E 58 00 00 3E 58 00 .........>X..>X.
0037F120: 00 00 58 00 50 01 58 00 62 00 00 00 00 00 00 00 ..X.P.X.b.......
0037F130: 00 3E 58 00 02 00 00 02 FA 00 00 FA 69 03 00 6A .>X.........i..j
0037F140: 5C 01 00 00 00 00 00 00 FF 07 00 00 03 00 00 00 \...............
0037F150: 15 9D 00 88 5C 01 00 00 E9 02 00 00 08 00 00 00 ....\...........
0037F160: 15 9D 00 88 21 00 00 00 90 5E E6 05 00 00 58 00 ....!....^....X.
0037F170: E0 5F E6 05 00 00 00 00 08 00 00 00 80 3E 58 00 ._...........>X.
0037F180: 00 00 00 00 00 00 58 00 60 51 E6 05 00 00 00 00 ......X.`Q......
0037F190: 10 00 00 10 90 5E E6 05 F0 51 E6 05 88 96 E2 05 .....^...Q......


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List of running WoW processes:

Process: G:\World of Warcraft\WoW.exe; pid: 1148
Hi,

Did you try running the Blizzard repair tool?
several times actually before I posted, also tried in safe mode
Do you start the game via the launcher?
yes have bypassed the shortcut and launched from within the Wow folder. Also Blizz repair program is finding nothing to repair
Hi,

Check to see if you have the latest updates for the following tools installed.

.net Framework 4.0 - http://www.microsoft.com/downloads/en/details.aspx?FamilyID=0a391abd-25c1-4fc0-919f-b21f31ab88b7&displaylang=en

C++ 2010 redistributable - http://www.microsoft.com/downloads/en/details.aspx?familyid=BD512D9E-43C8-4655-81BF-9350143D5867&displaylang=en

If these don't help try deleting the wow.exe file then run the repair tool again.

Also doublecheck your not running the game in a compatibility mode.
Hi,

was running C++ 2008 redistributable. Now have 2010 version
already had .net framework 4.0.
was not running in compatiblility mode
deleted wow.exe and repaired.

No Joy.

rebooted and tried again

Still no joy. Giving up on trying again today, will check again tomorrow.

I appreciate the time you are spending on this annoying problem though.
Thanks.
It might be a long shot but check to see if Internet Explorer is running in off-line mode, also check if your admin account is using a password.
ok done several things none of which worked.

moved wow to a different partition
set permissions for all my partitions
formatted the original partition
moved wow back to original
removed admin password and made IE my default broswer
it doesn't matter anymore. I am going through the slow painful process of a complete download and install instead

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