I'm Windows 8.1 x64, and have just set no new tasks again. There are too many issues here. I'm, seeing the "Postponed: VM job unmanageable restarting later" issue on pretty much all work units, but with the long deadline, I've ignored that, they start again after 24 hours. This morning, I saw another running, 100% done, and 26 hours . The project is not suitable for production as it is, (and as it was before...).

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Wave upon wave of demented avengers march cheerfully out of obscurity into the dream.

Agreed it is useless, one of my Win10 boxes gets many VM postponed unmanageable tasks. If I stop BOINC and restart it the tasks begin again from 0% - why is there no checkpointing implemented?
If it wasn't a sprint project for BOINCgames I wouldn't be running it.

I'm Windows 8.1 x64, and have just set no new tasks again. There are too many issues here. I'm, seeing the "Postponed: VM job unmanageable restarting later" issue on pretty much all work units, but with the long deadline, I've ignored that, they start again after 24 hours. This morning, I saw another running, 100% done, and 26 hours . The project is not suitable for production as it is, (and as it was before...).

Agreed it is useless, one of my Win10 boxes gets many VM postponed unmanageable tasks. If I stop BOINC and restart it the tasks begin again from 0% - why is there no checkpointing implemented?
If it wasn't a sprint project for BOINCgames I wouldn't be running it.

There has been no Windows developer associated with the project for three(?) years now and little is going to change anytime soon. The last time any Windows development was done, the current VirtualBox version was 5.2.xx and it remains the best version for this project. The issue arises then that many use VB for other projects, projects which benefit from using the most current version. I use ver. 5.2.38 and still get an occasional "Postponed..." message, but not nearly as many as I did using ver. 6.xx The stuck tasks issue comes from the Boinc manager losing contact with VirtualBox and is one of the hazards of running a Linux based project on a Windows machine. This project will accept all the babysitting you care to give it. This issue happens with all of us Windows users and we just deal. In my view, it's just a cost of doing real science.