I am getting this problem today:
when syncing, the client suddenly crashes with the following debug.log:
..... 2015-06-29 14:30:34 IO error: C:\Users\Internet\AppData\Roaming\Bitcoin\chainstate\713704.ldb: Zugriff verweigert (access denied)
2015-06-29 14:30:34 * System error while flushing: Database I/O error 2015-06-29 14:36:59 ERROR: ProcessNewBlock : ActivateBestChain failed 2015-06-29 14:37:00 net thread interrupt 2015-06-29 14:37:00 opencon thread interrupt 2015-06-29 14:37:00 dumpaddr thread stop 2015-06-29 14:37:00 addcon thread interrupt 2015-06-29 14:37:03 msghand thread interrupt 2015-06-29 14:37:03 Shutdown: In progress... 2015-06-29 14:37:03 StopNode() 2015-06-29 14:37:03 UPNP_DeletePortMapping() returned : 403 2015-06-29 14:37:03 upnp thread interrupt 2015-06-29 14:37:03 IO error: C:\Users\Internet\AppData\Roaming\Bitcoin\chainstate\713704.ldb: Zugriff verweigert (access denied) 2015-06-29 14:37:03 * System error while flushing: Database I/O error
The message says client is stopping but the process never closes. Any Ideas?