2014-Jun-30 18:31:41.753972 bitmonero v0.8.8.1()
2014-Jun-30 18:31:41.755973 Module folder: C:\Users\Khatmau_sr\monero.win.x64.latest\bitmonerod.exe
2014-Jun-30 18:31:41.762979 Initializing p2p server...
2014-Jun-30 18:31:41.767982 ERROR c:\users\tom\documents\github\bitmonero\src\p2p\net_node.inl:82 Exception at [node_server::init_config], what=invalid signature
2014-Jun-30 18:31:41.776987 ERROR c:\users\tom\documents\github\bitmonero\src\p2p\net_node.inl:213 Failed to init config.
2014-Jun-30 18:31:41.783994 ERROR ..\..\src\daemon\daemon.cpp:148 Failed to initialize p2p server.
2014-Jun-30 18:31:41.789996 Mining has been stopped, 0 finished
2014-Jun-30 18:31:44.552825 bitmonero v0.8.8.1()
2014-Jun-30 18:31:44.560830 Module folder: C:\Users\Khatmau_sr\monero.win.x64.latest\bitmonerod.exe
2014-Jun-30 18:31:44.568837 Initializing p2p server...
2014-Jun-30 18:31:44.573839 ERROR c:\users\tom\documents\github\bitmonero\src\p2p\net_node.inl:82 Exception at [node_server::init_config], what=invalid signature
2014-Jun-30 18:31:44.582847 ERROR c:\users\tom\documents\github\bitmonero\src\p2p\net_node.inl:213 Failed to init config.
2014-Jun-30 18:31:44.589850 ERROR ..\..\src\daemon\daemon.cpp:148 Failed to initialize p2p server.
2014-Jun-30 18:31:44.597855 Mining has been stopped, 0 finished
I would say the "invalid signature" error is your problem, I recall someone else having the same thing and a full reinstall (including wiping their %appdata%) fixed it. Make sure you backup your wallet.bin.keys file first though, just in case!
+1. Guys see my post above with step-by-step instructions to correctly migrate to clean 64-bit Monero installation.