Monero wallet stuck synchronising at 39680 using windows

Question

One time for less than an hour, the "Blocks Remaining" were actively counting-down. I have restarted both the daemon and the GUI Wallet several times. I have also left them both up and running for more than 24 hours multiple times. I sent Monero to the Wallet, but it shows 0.00 balance.

2017-11-10 07:55:58.208 9176 INFO global contrib/epee/src/mlog.cpp:145 New log categories: *:WARNING,net:FATAL,net.p2p:FATAL,net.cn:FATAL,global:INFO,verify:FATAL,stacktrace:INFO 2017-11-10 07:55:59.214 9176 ERROR msgwriter src/common/scoped_message_writer.h:94 Error: Couldn't connect to daemon Error: Couldn't connect to daemon

2017-11-10 07:56:18.876 9208 INFO global contrib/epee/src/mlog.cpp:145 New log categories: *:WARNING,net:FATAL,net.p2p:FATAL,net.cn:FATAL,global:INFO,verify:FATAL,stacktrace:INFO 2017-11-10 07:56:19.882 9208 ERROR msgwriter src/common/scoped_message_writer.h:94 Error: Couldn't connect to daemon Error: Couldn't connect to daemon

2017-11-10 07:56:21.915 3976 INFO global contrib/epee/src/mlog.cpp:145 New log categories: *:WARNING,net:FATAL,net.p2p:FATAL,net.cn:FATAL,global:INFO,verify:FATAL,stacktrace:INFO Height: 1400001/1400001 (100.0%) on mainnet, not mining, net hash 259.32 MH/s, v5, update needed, 0(out)+0(in) connections, uptime 0d 0h 0m 4s

2017-11-10 08:05:56.439 9444 INFO global contrib/epee/src/mlog.cpp:145 New log categories: *:WARNING,net:FATAL,net.p2p:FATAL,net.cn:FATAL,global:INFO,verify:FATAL,stacktrace:INFO Height: 1400001/1439681 (97.2%) on mainnet, not mining, net hash 259.32 MH/s, v5, update needed, 8(out)+0(in) connections, uptime 0d 0h 9m 35s

Answer 1

If you're stuck on height 1400001, it's very likely you're using an old version which doesn't know about the new fork consensus rules, so fails to see the new blocks as valid. You need to update your wallet to 0.11.1.0 (0.11.0.0 would also work, but has a few sync bugs, so switching to 0.11.1.0 directly is best). Just replace the binaries with the new ones, or pull from git and build, that's all you need to do. After restarting monerod and wallet to use the new code, it should start syncing again till the end.