Win7 Ultimate 32-bit system has 4G memory but shows only 2G available How to solve

The specific solution steps are as follows:

1. Press “WIN+R”Open“Run” In the window, enter the "msconfig” command and press Enter to open the "System Configuration" window;

2. In the pop-up "System Configuration", switch to the "Boot" tab. , then click “Advanced Options” button;

3, in the pop-up boot advanced options window, uncheck "Maximum memory", then click OK to close;

4 Restart the computer to take effect. Generally, it can be changed to 3.25G. If it still does not recover to 3.25G (not the integrated graphics card), then directly select the "Maximum memory" in step 3 and set it to 3.25. G, which is 3328M, but if you want to use 4G memory better, then it is recommended to use 64-bit win7 operating system (theoretically 4G memory supports 3.8G).