When I joined on Saturday files downloaded and 8 tasks ran fine. It showed Core 1.
On Sunday it changed to "Waiting for memory (8CPUs)" and has remained that way since with no activity.
I have Win 64 running on the top I7 chip which has 4 main cores split into 8 cores.
I have Boinc set to use up to 100% CPU, 80% RAM, No limit on GPU, suspend at 25% PC usage (which it only reaches if I transcode videos).
My PC is running at 1.5% CPU and GPU and I have 12 GB RAM Available. (It was actually on idle for 4 hours.)
NOTE: I have checked it is not blocked by the anti-virus or Firewall and even tried it with the virus/firewall off. Internet connection is fine. All the latest versions of Boinc and Virtual Box plus Virtual Box addon package.