You have a system with 12GB of RAM, but only 4GB is actually available for use.
You have a system with 12GB of RAM, but only 4GB is actually available for use.
Your system has more RAM than you think, but only a portion is available for use. The remaining 8GB is likely reserved for the operating system or other processes. To free up space, consider cleaning up temporary files, uninstall unused programs, and check for background applications consuming memory. If the issue persists, run a disk cleanup or update your drivers.
This could clarify why all extra RAM is flagged as reserved in Windows 7.