Not enough physical memory is available to power on this virtual machine with its configured settings.To fix this problem, adjust the additional memory settings to allow more virtual machine memory to be swapped.If you were able to power on this virtual machine on this host computer in the past, try rebooting the host computer. Rebooting may allow you to use slightly more host memory to run virtual machines.在VMware上接通电源出现这样的提示，怎么回事？求助高手！！！