This is the QT, not the install. I tried starting with -par=1 -maxconnections=4 -dbcache=4 but got the same error.
My other 24 wallets work fine on this PC.
Edit: Debug log:
2016-07-16 23:15:35 Crowncoin version v0.9.2.0-gc92ada3-beta (Sat, 16 Jul 2016 23:32:28 +0200)
2016-07-16 23:15:35 Using OpenSSL version OpenSSL 1.0.1h 5 Jun 2014
2016-07-16 23:15:35 Using BerkeleyDB version Berkeley DB 4.8.30: (April 9, 2010)
2016-07-16 23:15:35 Default data directory C:\Users\Beli\AppData\Roaming\Crowncoin
2016-07-16 23:15:35 Using data directory e:\WalletData\Crowncoin
2016-07-16 23:15:35 Using at most 4 connections (2048 file descriptors available)
2016-07-16 23:15:35 Using wallet wallet.dat
2016-07-16 23:15:35 init message: Verifying wallet...
2016-07-16 23:15:35 CDBEnv::Open : LogDir=e:\WalletData\Crowncoin\database ErrorFile=e:\WalletData\Crowncoin\db.log
2016-07-16 23:15:35 Bound to [::]:9340
2016-07-16 23:15:35 Bound to 0.0.0.0:9340
2016-07-16 23:15:35 init message: Loading block index...
2016-07-16 23:15:35 Opening LevelDB in e:\WalletData\Crowncoin\blocks\index
2016-07-16 23:15:35 Opened LevelDB successfully
2016-07-16 23:15:35 Opening LevelDB in e:\WalletData\Crowncoin\chainstate
2016-07-16 23:15:35 Opened LevelDB successfully
2016-07-16 23:15:41 LoadBlockIndexDB(): last block file = 14
2016-07-16 23:15:41 LoadBlockIndexDB(): last block file info: CBlockFileInfo(blocks=45605, size=70401358, heights=839928...885532, time=2016-04-18...2016-06-15)
2016-07-16 23:15:41 LoadBlockIndexDB(): transaction index disabled
2016-07-16 23:15:41 LoadBlockIndexDB(): hashBestChain=371a4b699206720f3b0ac8157e5905a18d828e3ac7993c5eeb9f7fac48071496 height=885532 date=2016-06-15 01:38:10 progress=1.000000
2016-07-16 23:15:41 init message: Verifying blocks...
2016-07-16 23:15:41 Verifying last 288 blocks at level 3
2016-07-16 23:15:41 CheckBlock() : Skipping throne payment check - nHeight 885533 Hash 371a4b699206720f3b0ac8157e5905a18d828e3ac7993c5eeb9f7fac48071496
2016-07-16 23:15:43 ERROR: CBlockUndo::ReadFromDisk : Checksum mismatch
2016-07-16 23:15:43 ERROR: VerifyDB() : *** found bad undo data at 885532, hash=371a4b699206720f3b0ac8157e5905a18d828e3ac7993c5eeb9f7fac48071496
2016-07-16 23:15:45 Aborted block database rebuild. Exiting.
2016-07-16 23:15:45 Initialization result: 0
2016-07-16 23:15:45 Requesting shutdown
2016-07-16 23:15:45 Running Shutdown in thread
2016-07-16 23:15:45 Shutdown : In progress...
2016-07-16 23:15:45 StopNode()
2016-07-16 23:15:45 Verifying mncache.dat format...
2016-07-16 23:15:45 Loaded info from mncache.dat 0ms
2016-07-16 23:15:45 Thrones: 0, peers who asked us for Throne list: 0, peers we asked for Throne list: 0, entries in Throne list we asked for: 0, nDsqCount: 0
2016-07-16 23:15:45 Writting info to mncache.dat...
2016-07-16 23:15:45 Written info to mncache.dat 0ms
2016-07-16 23:15:45 Thrones: 0, peers who asked us for Throne list: 0, peers we asked for Throne list: 0, entries in Throne list we asked for: 0, nDsqCount: 0
2016-07-16 23:15:45 Throne dump finished 0ms
2016-07-16 23:15:45 Shutdown : done
2016-07-16 23:15:45 Shutdown finished
I have admin rights & the previous versions ran fine. Might have to try a reindex then......