I have to say I AM SORRY in advance in case this has been asked a million time already, and answered:
I had not opened my wallet in weeks, thought to do it in passing and it just sat there, for hours, not opening. I tried a few times, it wouldn't.
I deleted the various block files and let it download it again, yay, it worked! but then today I came down and the entire system was locked up so I had to reboot, when I tried the wallet again, same crap, though, it gave me an error about failure to load some block file (I forget the exact language), so I deleted the shit again and am now waiting for another days worth of the wallet downloadingthe entire chain.
Is there any way to avoid this shit???
Check to make sure you are using updated addnodes in your MintCoin.conf file. Make sure it is in the right location too (located in the same folder with wallet.dat and blockchain files etc.)
Open up your MintCoin.conf file and delete and replace your addnodes with these... (then restart your wallet)
addnode=2.3.235.89
addnode=5.39.90.17
addnode=5.135.161.122
addnode=24.1.36.30
addnode=24.20.103.115
addnode=24.203.12.17
addnode=37.229.38.196
addnode=50.151.70.41
addnode=50.171.251.116
addnode=58.60.220.46
addnode=65.25.244.83
addnode=65.31.204.178
addnode=67.180.128.93
addnode=67.183.32.150
addnode=68.145.81.59
addnode=71.89.162.42
addnode=71.164.166.156
addnode=71.204.235.217
addnode=75.174.4.1
addnode=75.179.53.22
addnode=76.91.118.4
addnode=78.27.187.7
addnode=78.83.27.181
addnode=78.88.67.121
addnode=78.139.69.111
addnode=78.230.105.98
addnode=79.103.60.211
addnode=79.166.77.203
addnode=80.219.19.38
addnode=82.73.249.168
addnode=82.131.33.87
addnode=82.233.163.250
addnode=83.142.4.39
addnode=84.25.66.65
addnode=86.131.144.204
addnode=90.204.65.190
addnode=91.61.40.108
addnode=93.103.143.167
addnode=96.18.173.160
addnode=96.244.241.62
addnode=97.81.64.44
addnode=98.177.158.203
addnode=98.207.109.245
addnode=99.136.121.44
addnode=99.245.184.159
addnode=105.227.248.231
addnode=107.188.132.171
addnode=109.230.231.157
addnode=111.161.17.76
addnode=115.187.228.119
addnode=118.123.116.219
addnode=121.45.113.101
addnode=130.111.219.86
addnode=144.76.25.176
addnode=173.69.49.106
addnode=173.208.172.242
addnode=181.165.189.173
addnode=181.165.200.142
addnode=162.243.208.243
addnode=173.26.106.194
addnode=173.69.49.106
addnode=177.140.202.7
addnode=178.78.11.32
addnode=185.12.7.79
addnode=187.233.181.141
addnode=217.129.35.197
If you need more explanation look here
https://bitcointalksearch.org/topic/m.5001706This should also help anyone to sync their wallet faster and not lock up, etc. For example if you are updating your wallet to the newest version and re-downloading and syncing the blockchain. So try that and see if it helps. (Just give it about 10-15 minutes for the wallet to pickup connections and then things should go smoother).