To change the memory setting:
Note: If a guest PC is currently running, and you change the memory setting, you must restart the guest PC.
One of the characteristics that you must specify for a guest PC is the amount of RAM installed in the guest PC. This setting corresponds to the amount of RAM installed in a physical PC. It does not correspond directly to the amount of RAM used by Virtual PC to run this PC.
This warning is displayed regardless of the operating system that is installed on the guest PC, and may not be relevant for the guest PC you are specifying. Some operating systems, such as DOS, may run correctly in as little as 1MB.
You should determine for yourself the minimum amount of memory required by the operating system installed on the guest PC. To determine the amount of memory required for a particular operating system, consult the operating system manual.
When specifying the memory setting, keep in mind that amount of physical RAM available to the guest PC will change depending on what else is being run on the host PC, including additional guest PCs. For example, shutting down another guest PC would free up physical memory, and increase the memory available to this guest PC. Conversely, starting up another guest PC would consume physical memory, and reduce the amount available to this guest PC.
You should determine for yourself the optimum memory setting for each guest PC. When running more than one guest PC, it is not advisable to select the highest recommended setting for each guest PC. For help determining the optimum memory setting, see Memory use in Virtual PC.
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