Why does the XP system prompt "insufficient virtual memory"

XP system sometimes appears in the process of "virtual memory shortage", and such a situation, it is likely that the virus, virtual memory settings are improper, system space Inadequate reasons.
1. Infected with a virus. After the virus is infected, the virus will occupy a large amount of memory space, and the system will run out of memory. Users can upgrade the virus database for antivirus.
2. The virtual memory is not set properly. If the virtual memory is set too small, it will affect the normal operation of the system. The method of virtual memory setting is as follows:
Step 1: Right-click "My Computer", select "Properties" and open "System Properties".
Step 2: Switch to the “Advanced” tab and click “Settings” in the “Performance” area to open the “Performance Options” dialog box.
Step 3: Click “Change” in the “Virtual Memory” area to change the virtual memory size and restart the system when you are finished.
3. Insufficient system space. The remaining space on the system disk is small, which is also the main cause of insufficient memory. In the process of using, try not to install various application software in the system disk, to ensure that the virtual memory file has enough space to use.