So recently I have had some real bad issues with wow hanging on me takes about a minute for the game to respond usualy when i hit ctrl alt del several times during the hang, which allows me to get out of it. Background continues to work sound in background works etc mouse works but game freezes.

So inspecting all the elements of the game I found this in my log:

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# System started at 2012-01-22 21:47:44.2724
# system: AWESOME-PC
#-----------------------------------------------------------
22:17:05.1939 Detected corruption for MD5 block #59, amount = 16384
22:17:05.1939 Corruption in archive = Data/Cache/patch-base-13914.MPQ, file = creature\drake\northrenddrake.m2
22:17:05.1939 Detected corruption for MD5 block #59, amount = 16384
22:17:05.1939 Corruption in archive = Data/Cache/patch-base-13914.MPQ, file = creature\drake\northrenddrake.m2
22:17:05.1939 Detected corruption for MD5 block #59, amount = 16384
22:17:05.1939 Corruption in archive = Data/Cache/patch-base-13914.MPQ, file = creature\drake\northrenddrake.m2
22:17:05.2274 Successfully deleted creature\drake\northrenddrake.m2
22:17:05.5783 Successfully reloaded creature\drake\northrenddrake.m2

#-----------------------------------------------------------
# System started at 2012-01-26 16:33:43.4216
# system: AWESOME-PC
#-----------------------------------------------------------
22:36:40.0439 Detected corruption for MD5 block #17, amount = 3731
22:36:40.0439 Corruption in archive = Data/wow-update-base-14946.MPQ, file = SPELLS\DRAGONCHROMATIC.blp
22:36:40.0451 Succeeded to mark data (offset = 131630431, length = 3731) remote
22:36:40.1835 Succeeded to re-read data (offset = 278528, length = 3731)
22:36:40.1835 Succeeded to mark data (offset = 131634434, length = 16) remote
22:36:40.2463 Succeeded to re-read MD5 (offset = 282531, length = 16)

#-----------------------------------------------------------
# System started at 2012-01-31 04:26:09.6849
# system: AWESOME-PC
#-----------------------------------------------------------
04:29:40.6074 Detected corruption for MD5 block #120, amount = 16384
04:29:40.6074 Corruption in archive = Data/Cache/patch-base-14946.MPQ, file = character\worgen\male\worgenmale.m2
04:29:40.6074 Detected corruption for MD5 block #120, amount = 16384
04:29:40.6074 Corruption in archive = Data/Cache/patch-base-14946.MPQ, file = character\worgen\male\worgenmale.m2
04:29:40.6075 Detected corruption for MD5 block #120, amount = 16384
04:29:40.6075 Corruption in archive = Data/Cache/patch-base-14946.MPQ, file = character\worgen\male\worgenmale.m2
04:29:40.6523 Successfully deleted character\worgen\male\worgenmale.m2
04:29:41.5648 Successfully reloaded character\worgen\male\worgenmale.m2

#-----------------------------------------------------------
# System started at 2012-02-01 18:52:51.4969
# system: AWESOME-PC
#-----------------------------------------------------------
19:24:48.0569 Detected corruption for MD5 block #9, amount = 16384
19:24:48.0569 Corruption in archive = Data\art.MPQ, file = CREATURE\DRAGONKALECGOS\DRAGONSKIN3KALECGOS.blp
19:24:48.0569 Succeeded to mark data (offset = 528675286, length = 16384) remote
19:24:48.2387 Succeeded to re-read data (offset = 147456, length = 16384)
19:24:48.2388 Succeeded to mark data (offset = 528696066, length = 16) remote
19:24:48.2874 Succeeded to re-read MD5 (offset = 168236, length = 16)
20:29:49.5658 Detected corruption for MD5 block #40, amount = 16384
20:29:49.5658 Corruption in archive = Data\art.MPQ, file = character\troll\male\trollmale.m2
20:29:49.5658 Succeeded to mark data (offset = 105910552, length = 16384) remote
20:29:49.7872 Succeeded to re-read data (offset = 655360, length = 16384)
20:29:49.7872 Succeeded to mark data (offset = 106190751, length = 16) remote
20:29:49.9018 Succeeded to re-read MD5 (offset = 935559, length = 16)
20:29:49.9020 Detected corruption for MD5 block #41, amount = 16384
20:29:49.9020 Corruption in archive = Data\art.MPQ, file = character\troll\male\trollmale.m2
20:29:49.9020 Succeeded to mark data (offset = 105926936, length = 16384) remote
20:29:50.0121 Succeeded to re-read data (offset = 671744, length = 16384)
20:29:50.0121 Succeeded to mark data (offset = 106190767, length = 16) remote
20:29:50.0453 Succeeded to re-read MD5 (offset = 935575, length = 16)