Disconnect the machine from the public internet entirely.
Actual usable RAM usually sits around 3.25 GB to 3.5 GB due to system allocations. windows 7 pro 32 bits
If you're still using Windows 7 Professional 32-bit, it's essential to consider upgrading to a newer operating system to ensure continued security and support. You can upgrade to a newer version of Windows, such as Windows 10 or Windows 11, to take advantage of the latest features, security updates, and support. Disconnect the machine from the public internet entirely