Zwift is not responding

I have a problem. Three times in a row I started training and Zwift gets stuck and shows not responding in the top left. I tried to wait but nothing happend. Please advice what I need to do to work zwift stable without any surprises on ride.
Intel(R) Core™ i5 CPU M 480 @ 2.67GHz 2.67 GHz, RAM 4,00 GB, AMD Radeon HD 6550M UP to 1659MB HyperMemory, operating system 64-bit , processor x64 Windows 10 Enterprise.
I’ve got second computer, which has worse parameters but computer is newer and there everything work good but quality is terrible and training with it is not enjoyable. (Win 10 home 64-bit, Processor AMD E1-6015 APU with Radeon ™ R2 Graphics 1.40 GHz, RAM 4,00 GB.
Please help me! :slight_smile: