Why is the CPU occupancy rate up to 100%?

　Nine possibilities for high CPU usage:

1, anti-virus software caused the failure

Because of the new version of KV, Jinshan, rising are added to the Web page, plug-ins, mail random monitoring, undoubtedly increased the system burden. Treatment: Basically there is no reasonable treatment, try to use the least monitoring services, or, upgrade your hardware equipment.

2, the driver has not been certified, resulting in 100% CPU resource consumption

A large number of beta drivers are flooding the web, causing difficult to find fault causes. Processing methods: Especially the graphics driver should pay special attention to, recommend the use of Microsoft Certified or officially issued by the driver, and strictly check the model, version.

3, virus, Trojan caused

A large number of worms are rapidly replicating within the system, resulting in high CPU utilization. Solution: Clean the system memory and local hard drive with reliable anti-virus software, and turn on the system setup software to see if there are any abnormal startup procedures. Update anti-virus software and firewalls regularly, strengthen anti-virus awareness, master the correct anti-virus knowledge.

4. System service

Control Panel-Admin tool-Service-rising Realtime MONITOR service Point right mouse button, change to Manual.

5. Startup item

Start->; run->;msconfig->; start, turn off unnecessary startup items, reboot.

6, view "Svchost" process

Svchost.exe is a core process of Windows XP systems. Svchost.exe not only appears in Windows XP, but there are svchost.exe in Windows systems that use the NT kernel. Typically, the number of svchost.exe processes in Windows 2000 is 2, and the number of svchost.exe processes in Windows XP rises to 4 and more than 4.

7. View network connection

Mainly is the network card.

8. View network Connection

When a Windows XP computer is installed as a server, when you receive a connection request on port 445, it allocates memory and provides a small amount of CPU resources to service these connections. When overloaded, the CPU occupancy rate may be too high, because there is an inherent trade-off between the number of work items and the ability to respond. You need to determine the appropriate MaxWorkItems settings to improve system responsiveness. If you set an incorrect value, the server's responsiveness may be affected, or a user can monopolize too many system resources.

To resolve this issue, we can resolve this by modifying the registry: In the Registry Editor, expand the [Hkey_local_machinesystemcurrentcontrolsetserviceslanmanserver] branch in turn, Create a new DWORD value named "MaxWorkItems" in the right window. Then double-click the value, type the following values in the open window and save the exit:

If your computer has more than 512MB of RAM, type "1024", or "256" If your computer has less than MB of memory.

9. See if Windows XP uses the right mouse button to cause CPU occupancy of 100%:

A short time ago said that using the right mouse button inside the Explorer would result in 100% of CPU resources, so let's see what's going on here.

Sign:

In the Explorer, when you right-click a directory or a file, you will likely have the following problems listed:

The copy operation of any file at that time will likely stop the corresponding

The speed of network connection will decrease significantly

All stream input/output operations such as using Windows Media Player to listen to music may be the cause of music distortion:

When you right-click a file or directory in the Explorer, when the shortcut menu is displayed, the CPU occupancy rate will increase to 100%, and when you close the shortcut menu, return to the normal level.

Workaround:

Method One: Turn off "use transition effects for menus and tooltips"

1, click "Start"--"control Panel"

2, in the "Control Panel" inside double-click "Display"

3, in the "display" attribute inside click "Appearance" tab page

4, in the "Appearance" tab inside click "Effect"

5. In the "Effect" dialog box, clear the check box in front of the "Use transition effect for menus and tooltips" and then click the "OK" button two times.

Method Two: When using the right mouse click File or directory, first use the left mouse button to select your target file or directory. Then use the right mouse button to eject the shortcut menu.

CPU Footprint 100% Solution

In general, CPU accounted for 100% of the words our computer will always slow down, and many times we can do a little bit of change can be solved, without asking those prawns.

When the machine slows down, the first thing we think of is, of course, the task manager, to see exactly which program accounted for the ratio, if it is a large program that can be forgiven, in the shutdown of the program as long as the CPU normal, then there is no problem; if not, then you have to see what is the program, When you can't find out what this process is, go to Google or Baidu search. Sometimes the end is useless, in XP we can combine the Msconfig in the startup item, put some unused items to turn off. You can go to the next Winpatrol in 2000.

Some of the most commonly used software, for example, the browser occupies a very engaged CPU, it is necessary to upgrade the software or simply use other similar software instead, sometimes the software and the system will be a little incompatible, of course, we can try the XP system under the compatibility of the program, right click on the exe file selection compatibility.

Svchost.exe sometimes is a headache, when you see one of your svchost.exe occupy a large CPU, you can go to the next aports or fport to check its corresponding program path, that is, what is in the fall of this svchost.exe, if not C: Windowssystem32 (XP) or C:winntsystem32 (2000), that's suspicious. Upgrade antivirus software antivirus bar.

Right-clicking a file causes 100% CPU to occupy we will also encounter, sometimes the right button pause may be the problem. Official explanation: First click on the left button to select, and then right (not very understanding). Unofficial: Resolve by right-clicking on the desktop-properties-appearance-effects, canceling for menus and tooltips using the following excesses (U). There are some anti-virus software on the file monitoring will also have an impact, you can turn off the anti-virus software file monitoring, there is the Web page, plug-ins, mail monitoring is the same truth.

Some drivers may sometimes have this phenomenon, preferably the choice of Microsoft Certified or the official release of the driver to install, and sometimes appropriate upgrades to drive, but remember the latest is not the best.

CPU cooling software, because the software in the runtime will use the CPU idle time to cool, but windows can not distinguish between ordinary CPU consumption and cooling software cooling instructions between the difference, so the CPU always show 100%, this does not have to worry about, does not affect the normal system operation.

When working with large word files, because Word spelling and grammar checking can make the CPU tired, just turn on Word's tools-options-spelling and grammar to remove the check spelling and check grammar.

The high CPU usage after clicking AVI video file is because the system will first scan the file, and check all parts of the file, and establish an index; Workaround: Right-click the folder that holds the video file-Properties-general-Advanced, remove the tick to allow Indexing Service to index the folder for quick Search.

CPU Footprint 100% Case Study

1, the Dllhost process causes CPU utilization to occupy 100%

Features: Server normal CPU consumption should be below 75%, and CPU consumption should be up and down, the server with this problem, the CPU will suddenly be at 100% level, and will not drop. Viewing Task Manager, you can find that DLLHOST.EXE consumes all of the CPU idle time, in which case the administrator has to restart the IIS service, and strangely, after restarting the IIS service, everything is fine, but it may be a while before the problem comes back.

Direct reason:

One or more Access databases are corrupted during multiple reads and writes, while Microsoft's MDAC system is writing to this corrupted access file, the ASP thread is in block state, and the other threads can only wait, IIS is deadlocked, and all CPU time is consumed in dllhost.

Solution:

Install the first class information surveillance interception system, use the Chief File Checker IIS health Inspector software, enable the Find deadlock module, and set:

--wblock=yes

Directory to monitor, specify the directory of your host's files:

--wblockdir=d:est

Monitor the file save location of the generated log in the log directory of the installation directory, the file name is: logblock.htm

Stop IIS, start the Chief File Checker IIS health inspector, and then start IIS, and the Chief File Checker IIS health inspector will record the last written Access file in Logblock.htm.

After a while, when the problem comes out, for example, the CPU will be at 100% again, you can stop IIS, check the last 10 files that logblock.htm records, and note that the most problematic is often the access file for the counter class, for example: "**count." MDB "," **count. ASP, you can first delete the last 10 files or suspect files to the Recycle Bin, and then start IIS to see if the problem occurs again. We believe that after careful searching, you can certainly find this file that has been bothering you for a while.

After you find this file, you can delete it, or download it, fix it with ACCESS2000, and the problem is solved.

2, the svchost.exe caused by the CPU utilization rate occupies 100%

In fact, Svchost.exe is a core process of Windows XP systems. Svchost.exe not only appears in Windows XP, but there are svchost.exe in Windows systems that use the NT kernel. Typically, the number of svchost.exe processes in Windows 2000 is 2, and the number of svchost.exe processes in Windows XP rises to 4 and more than 4. So there are a few svchost.exe in the system's process list that you don't need to worry about.

Svchost.exe is a core process of a system, not a virus process. However, because of the particularity of the Svchost.exe process, the virus will do everything possible to invade Svchost.exe. You can confirm whether poisoning is possible by looking at the execution path of the Svchost.exe process.