A computer is configured for either full operation with metering or limited mode operation. When in limited mode operation, the system memory may be partitioned into active and restricted memory. The active memory may be limited to an amount needed to execute a limited mode operation application. The remaining restricted memory may be made inaccessible to the computer's processor. To verify the restricted memory remains unused, it may be filled with a pattern and the pattern periodically verified to determine that unauthorized programs are not using the restricted memory.