The volume of the newly installed Win7 system is a bit scary. A system with a 2.4G CD is small, and the system is 6~7G and 12~13G (virtual memory page file depends on the memory capacity). Is Win7 born so bloated? Not also ~ 1, close the virtual memory (Note: If the original only 2G memory does not upgrade the memory capacity to 4G, please do not close, otherwise the system will easily explode the memory and cause the process or even the system crash) Win7 accounted for the largest file of hard disk space, bear the brunt It is a virtual memory file, or a page file. This file is hidden in the root directory of the C drive, and the file name is pagefile.sys. Virtual memory is a function that exists in the XP era. Its core essence is to make the program call write by virtualizing the hard disk space into memory, thereby solving the contradiction that the operating system and the process occupy too much memory resources and the physical memory capacity is insufficient. The virtual memory size is automatically adjusted by the system by default, which is about twice the current physical memory capacity. Turning off virtual memory can not only save 3~4G space, but also significantly improve the running speed of the system and greatly reduce the number of hard disk reads (which can extend the life of the hard disk and reduce the chance of bad sectors). Frankly speaking, virtual memory can solve the problem of insufficient physical memory. Unfortunately, the hard disk can't be used as memory, and it is the bottleneck in the von Norman architecture computer. The speed of the hard disk is several orders of magnitude lower than the memory, and the delay is several orders of magnitude higher. The virtual memory is the way to cure the symptoms. The cost of using virtual memory is that there are many running programs in the background or running large 3D games. When the program starts, runs, and switches, the system reflects slow or even suspended animation. It takes a long time to reflect, especially when playing a large game with a lot of memory. Especially obvious, I believe that most people feel the same (when the game is played, the hard disk frequently reads the disk, resulting in one card and one card. Switching out of the desktop requires a black screen for a long time to react). It is also very frank to tell you that to run the Win7 system smoothly in the case of frequent backgrounds and even large games, 2G memory is stretched. Win7 system is based on Vista's NT6.1 architecture. When supporting new hardware and improving new functions, the resource consumption is also improved compared with XP. The minimum load is 300~400M memory under no-load conditions. The process consumes more memory when running programs. Big. If you use 2G memory and memory to turn off the virtual memory, you can only meet the Internet, document editing and other applications. Running a large game will be quite easy to crash. If the physical memory is upgraded to 4G, it is quite abundant. This is also the reason why the children's shoes without upgrading the memory should not be shut down. The closing method is a bit more complicated: right click on my computer, select Properties, then select Advanced System Settings on the left, click the first performance settings button in the Advanced menu, click Advanced in the Performance Options box, and then click Virtual below. Memory change button, finally select the partition where the system is located, then click to select the non-paged file below, click OK, and finally confirm the exit step by step. After restarting the system, you will find that the virtual memory is gone, and the C drive is also slimming down 3~4G. Summary: For Xiao Y, adding a 2G DDR3 memory upgrade memory to 4G dual channel is king. 2, shut down the system sleep (Note: If you often want to use the sleep function of the children's shoes, please do not do this step, otherwise the sleep function will not be available) Say Win7's big file, the second is the hibernation file. This file is also hidden under the root directory of the C drive, and the file name is hiberfil.sys. Its size is equal to the size of the computer's physical memory. The principle of system hibernation is to write all the contents of the current memory to the hibernation file after clicking hibernate (the data will disappear after the memory is powered off and the hard disk will not be), so the system can safely close the power and close the cover; When you copy all the contents of the hibernation file back to the memory, the computer will go back to the operating state before hibernation. In most cases, sleep is generally used, sleep is relatively useless, and sleep startup speed is even slower than restarting. Therefore, if you do not use the sleep function, you can safely shut down the system and make room for the system to lose weight. Turn off the system to sleep a lot, open the C:\\Windows\\System32 directory, find cmd.exe, right click and run as administrator, type powercfg -h off and press Enter. It is also possible to use the Windows 7 Optimization Master. 3, close the system restore and delete the restore point (have to use the system restore children's shoes do not close) The principle of system restore is to record the changes we made to the system through the settings of the restore point, when the system fails, you can not need If you reinstall the operating system without affecting your personal data files (such as files, emails, or photos), you can use System Restore to restore your system to its pre-change state and continue to use it normally. By default, the patch is generally installed, some changes are made to the system, and Windows will automatically generate restore points after installing the driver. If there are a few M, then hundreds of M. Restore points can also be manually added and generated by the restore image file. When there is a problem with the system, Windows can press the F8 advanced menu to bring up the advanced menu to load the last correct configuration to restore when booting. It is also possible that Windows will automatically restore after detecting the problem. It is true that Windows 7's system restore function has been greatly enhanced compared to Vista and XP, but system restore still has its limitations, such as system file loss, poisoning, software restores will not help, and restore points accumulate more without changing the default settings. The system will get bigger and bigger. Relatively speaking, using one-click restore or Ghost backup is far better than system restore. Therefore, if you do not use the system restore function, you can safely close and delete all restore points. The shutdown method is very simple. If you turn off the virtual memory above, open my computer familiar-advanced system settings, select the system protection menu, select the C drive (the default is the system disk open), click on the configuration, you can close the system restore and Clear the restore point operation. 4, remove Windows does not need components and backup files Let's take a closer look at the location and content of these components that can be cut: 1, C: \\ Windows \\ SoftwareDistribution Students should not be fooled by the name of the folder ~ this folder is actually the system The backup folder of the old system files after patching, similar to the hidden folder of KBXXXXXX in the C:\\Windwows folder of the previous XP system. The patch released by Microsoft is not to fix the bug or to supplement the system vulnerability. However, after the general system is patched, it will rarely need to be uninstalled because of the unstable situation. Therefore all files under this folder can be safely deleted. Deleting this folder can free up 200M or more of hard disk space, depending on the number of patches the system has played. In the normal running state of Windows, some files in this folder are used and cannot be deleted. Need to complete the deletion can be deleted by pressing F8 to enter safe mode at boot time. 2, C: \\ Windows \\ winsxs \\ Backup The winsxs folder is a very important folder in the Windows directory, stored in Windows has many important components, the version is also very complex, its importance is no less than the familiar System32 folder. These files support mscorwks.dll and can't be loaded without them nmscorwks. If the system files inside are forcibly deleted, Windows may only barely enter safe mode, and Windows will "hang". In order to ensure the normal operation of Windows, the files inside do not delete when you do not know what it is. However, winsxs single folder takes up more than half of Windows' volume (nearly 3GB). Not only that, as the system usage time increases, the volume of the winsxs folder becomes more and more bloated. Is the winsxs folder so inviolable? Not all the contents of the Backup folder below it can be safely deleted. The files in the Backup folder are the same as the SoftwareDistribution folder above. In fact, it is also the original old system file after the backup and Windows patching. The stored files are larger and the folder size is smaller than the SoftwareDistribution. Deleting files under C:\\Windows\\winsxs\\Backup is relatively complicated. If you want to delete them simply, you can use the system cleanup master that comes with Windows7 Optimizer to delete them. Manual deletion requires ownership of the Backup folder. 3, C: \\ Windows \\ System32 \\ DriverStore \\ FileRepository See the name of many children's shoes may have guessed, this folder is actually stored Win7 comes with the driver files. In addition, the old driver will be stored here by Win7 backup after the system has installed the new driver for the hardware. Many children's shoes (especially with desktop computers) as long as the machine hardware is released in 2008 or before, the new version of Win7 can be used directly after the system can be installed without the drive is it. As a new generation of Windows systems, in order to support so many old hardware that has been released, Win7's own drivers are far better than Vista and XP, at the cost of huge size. For the newly installed Win7 system, this folder has 700~800 M. As the system has more drive hardware and more and more updated driver versions, the volume of this folder will also grow like a snowball. Obviously, everyone also guessed that most of the driver files in the game are not matched with the machine, and only a small part is suitable for the machine. In addition, many times when the system is updated with a new version of the bug that has been fixed and the function has been enhanced, there is no need to back up the old driver. However, although the folder is very bloated, it is still very important. Many of the original drivers supported by Windows and some hot-swappable hardware are also stored here. Some children's shoes use the Windows7 optimization master to clean up the files inside. After the hot-swappable handles, cards, etc. are plugged into the machine, they are not responding to the driver, because the files inside are cleared. Therefore, if you need to clean up these extra files in your children's shoes, it is best to install all the hardware you want to use on the machine and install the driver. 4. Other cleanable folders and system temporary folders: C:\\Users\\Public\\Music: Stores sample music, which is the song that you can hear when you open Media Player after Windows is installed. It is estimated that no one will listen to it~ you can safely delete ~ C:\\Users\\Public\\Pictures: store sample images. It is estimated that no one will watch it~ delete it~ C:\\Users\\Public\\Videos: Store the sample video, that is, the two paragraphs that you open after you open Media Player after Windows is installed~ Delete it~ The following folders are all stored in the system. Temporary files. You can clean up the junk files in your children's shoes as appropriate. C:\\Windows\\Temp: Store the temporary files generated by the program installation and operation. You can safely delete the garbage inside C:\\Users\\ (current system user name)\\AppData\\Local\\Temp: it is also the storage program installation and operation. Temporary files, the default temporary directory for WinRAR decompression are also here. You can safely delete the garbage inside C:\\Users\\ (current system user name)\\AppData\\Local\\Microsoft\\Windows\\Temporary Internet Files: IE or IE kernel browser to download various images, Flash and other content is stored when browsing the webpage Here, when the web page is read, the things inside become garbage files~ Don't worry about cleaning it up~ C:\\Users\\(current system user name)\\AppData\\Local\\Microsoft\\Windows\\History: As the name implies, store the browsing page to leave Cookies, history, forms, passwords. To clean up the saved password, browsing history, and record, delete the contents inside. In fact, it is cleared in the IE-Internet option. After the above round of weight loss, the footprint of the newly installed 32-bit system can be controlled within 5G, and 64-bit can be controlled within 6G. Far more "slim" than the original genuine OEM system, but also much cleaner.
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Natural Systems:
The individuals in the system exist or evolve according to the laws of nature, producing or forming a group of natural phenomena and feature. Natural systems include ecological balance systems, living organism systems, celestial systems, physical microstructure systems, and social systems.
Manual Systems:
Individuals in the system operate according to artificial, pre-programmed rules or planned directions to achieve or complete functions and performance that cannot be achieved by individual entities within the system. With the result.
Manual systems include stereoscopic imaging, production systems, transportation systems, power systems, computer systems, educational systems, medical systems, enterprise management systems, and more.
Composite Systems:
Composite systems are a combination of natural and artificial systems. The composite system includes a navigation system, a traffic management system, a human-machine system, and the like. In the process of creating cybernetics, Wiener regards the communication and control of animals and machines as a system.