virtualbox.org

Help. Win 8 don't install...

Host RAM: 2047MB total, 1024MB available
VM RamSize <integer> = 0x0000000080000000 (2 147 483 648, 2 048 MB)

message="Unable to allocate and lock memory. The virtual machine will be paused. Please close applications to free up memory or close the VM"

Also: read the "Windows 8" sticky in the "Windows Guests" forums. Most trivial issues have been dealt with there, some multiple times.