Memory plays a great role in the computer. All running programs in the computer need memory. If the executed program is large or many, it will lead to memory exhaustion. In order to solve this problem, WINDOWS uses virtual memory technology, that is, a part of the hard disk space is used as memory, which is called virtual memory, and the virtual memory exists on the hard disk in the form of page files. Virtual memory is only a supplement to the lack of physical memory, so don't deify it. The reading and writing performance of virtual memory (that is, the reading and writing speed of hard disk) is only a few tenths of that of physical memory, and high-frequency reading and writing operations are very harmful to hard disk! Hard disk bad track is easy to happen! Don't use it if you can, and use it less if you can! The principle is enough+leave a small margin.

In Win7 system environment, the memory is generally 5 12MB. According to the actual memory usage, the virtual memory can be set to 5 12-768MB (the sum of memory+virtual memory is generally 256MB higher than normal usage). 1GB memory, according to the actual usage of memory, you can set the virtual memory as 128-5 12MB (the sum of memory+virtual memory is generally 256-5 12MB higher than the normal usage). If the memory is more than 2G, you can generally disable virtual memory (if there are software restrictions, you can set a small amount of virtual memory, such as 128MB). Some people who do use a lot of memory, such as playing large 3D games, making large pictures, 3D modeling, etc. , and received a warning that the system memory is insufficient, and virtual memory needs to be increased appropriately.

Generally, you can disable the virtual memory first, restart the computer to enter safe mode (don't run many programs at this time), then defragment it, and reset the virtual memory after completion, so that the page file can be read and written faster without fragmentation. Or use PE/ emergency disk to boot into the system, delete the page file, tidy up the disk, and restart. Take WIN7 as an example, right-click "computer", properties, advanced system settings, performance settings, advanced, virtual memory change, automatic management cancellation, user-defined size, settings, OK, exit and restart.

2. Delete hibernate file hiberfil.sys

Many people often don't know what computer hibernation is. In fact, computers have two low-power running states, hibernation and sleep. Our computers generally use the sleep function, that is, the computer enters a low power consumption state after a certain period of time, and the working posture is stored in the memory, and it can be restored to the original working state in 1-2 seconds. This function is very practical and most commonly used. However, hibernation is to write the working state, that is, all memory information, to the hard disk. Take 4G memory as an example, that is, write 4G files to the hard disk first, and then turn it off. Boot recovery requires reading 4G files into memory and restoring the original working interface. It takes a lot of time to read and write 4G files, which is no less than normal startup, so the hibernation function is not practical now. Heberfield SYS file is used to save the memory state during sleep. It will take up the space equivalent to the memory capacity of drive C (taking 4G memory as an example, this file is 4G), so it can be completely deleted without affecting everyone's use.

Operation method: run CMD with administrator authority and type the following command: POWERCFG -H OFF to automatically delete files.

(How to run as an administrator: Right-click All Programs-Accessories-Command Prompt and select Run as Administrator)

3. compress the C:Windowswinsxs folder

This folder is the system installation folder and is not used most of the time. After compression, you can save more than 1GB of disk space. Methods: First, get the read-write permission of the WINSXS folder (by default, the administrator only has the read permission of this folder), then select WINSXS and click the right mouse button to compress the contents in General-Advanced ...-Save disk space. The compression process takes 10-30 minutes, depending on the performance of the hard disk.

Through the above three steps, your Win7 pure system should only account for about 6G.