I'm having the exact same problem. CPU usage skyrockets from 14% to 100% on startup. I have a 64 bit OS with 16 GB of memory. Processor is Intel Core i7-5600U.
*16 GB ram, not memory.
It loaded after waiting around for several minutes, I'm in now.
You fool, ram IS memory xD
RAM is memory. Disk storage space is not memory. You said the right thing.
