Can you please post the Debug.log file. It can be found in the data directory. See https://en.bitcoin.it/wiki/Data_directory#Windows for reference.
https://www.dropbox.com/s/ksghgsok3e9zm73/debug.zip?dl=0
Last start (username removed) for simplicity:
Code:
2016-05-03 03:43:42 Bitcoin version v0.12.1 (2016-04-11 13:01:43 +0200)
2016-05-03 03:43:42 InitParameterInteraction: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1
2016-05-03 03:43:43 GUI: "registerShutdownBlockReason: Successfully registered: Bitcoin Core didn't yet exit safely..."
2016-05-03 03:43:43 Using BerkeleyDB version Berkeley DB 4.8.30: (April 9, 2010)
2016-05-03 03:43:43 Default data directory C:\Users\username\AppData\Roaming\Bitcoin
2016-05-03 03:43:43 Using data directory C:\Users\username\AppData\Roaming\Bitcoin
2016-05-03 03:43:43 Using config file C:\Users\username\AppData\Roaming\Bitcoin\bitcoin.conf
2016-05-03 03:43:43 Using at most 125 connections (2048 file descriptors available)
2016-05-03 03:43:43 Using 4 threads for script verification
2016-05-03 03:43:43 Using wallet wallet.dat
2016-05-03 03:43:43 scheduler thread start
2016-05-03 03:43:43 init message: Verifying wallet...
2016-05-03 03:43:43 CDBEnv::Open: LogDir=C:\Users\username\AppData\Roaming\Bitcoin\database ErrorFile=C:\Users\username\AppData\Roaming\Bitcoin\db.log
2016-05-03 03:43:43 Bound to [::]:8333
2016-05-03 03:43:43 Bound to 0.0.0.0:8333
2016-05-03 03:43:43 Cache configuration:
2016-05-03 03:43:43 * Using 2.0MiB for block index database
2016-05-03 03:43:43 * Using 32.5MiB for chain state database
2016-05-03 03:43:43 * Using 65.5MiB for in-memory UTXO set
2016-05-03 03:43:43 init message: Loading block index...
2016-05-03 03:43:43 Opening LevelDB in C:\Users\username\AppData\Roaming\Bitcoin\blocks\index
2016-05-03 03:43:43 Opened LevelDB successfully
2016-05-03 03:43:43 Using obfuscation key for C:\Users\username\AppData\Roaming\Bitcoin\blocks\index: 0000000000000000
2016-05-03 03:43:43 Opening LevelDB in C:\Users\username\AppData\Roaming\Bitcoin\chainstate
2016-05-03 03:43:44 Opened LevelDB successfully
2016-05-03 03:43:44 Using obfuscation key for C:\Users\username\AppData\Roaming\Bitcoin\chainstate: 0000000000000000
db error?
