Ask for advice. Ask Windows Wallet can not be synchronized?
Add some nodes, it will helps you:
addnode=93.166.211.24
addnode=171.101.220.223
addnode=221.156.137.241
addnode=110.78.138.109
addnode=124.120.98.202
addnode=85.14.242.76
addnode=199.247.27.227