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Recently while using my laptop (Dell XPZ15z) all of a sudden the CPU usage is spiking to 80-100% then will drop in say 5-7 sec. I am not running any application or process that requires such CPU usage.

I am doing a lot of online gaming, while playing the same thing happens but the additional things happening are that the ping becomes 1500+ all of a sudden from 90-130 and then its showing network connection problem. Then I regain connection again in 5-7 sec. But now i noticed its the same time while my CPU usage is going above 80%.

Another incident that occurred is that while I was watching an YouTube video, all of sudden the video began to hang even though it was buffered earlier. Then the video stopped further playing and I saw that the CPU usage was way beyond 80 nearly 100%.

I increased the virtual page memory to almost 10 GB in all the drives. But it seems to have no effect as the problem continues. I have up to date anti-virus (Avast) and I scanned the whole system but no virus also have been found.

My system configuration is as follows:

  • Intel Core i7-2640M 2.80GHz
  • 8Gb DDR2(4*2)
  • 750Gb HDD
  • Nvidia 525M graphics card
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capture a xperf trace when you have the issue and upload it: pastebin.com/pgE11HRD –  magicandre1981 Oct 9 '13 at 17:46
    
@magicandre1981:i am using windows 7... –  Krishna Chandran Oct 10 '13 at 8:03
    
@magicandre1981:These are some snapshots of CPU usage while the problem occurred. docs.google.com/file/d/0BweeVUiqmiuQWDloY1o5dTBfQWc/… docs.google.com/file/d/0BweeVUiqmiuQc2gxNEdjSUZ6NUk/… –  Krishna Chandran Oct 10 '13 at 8:11
    
Krishna, first of all, the green line in the Task Manager is just user time which doesn't need to have any impact on other running processes. More important would be the red line which shows kernel times (can be enabled in the options menu). You should also look for the process or service responsible for this because obviously there is a process running that causes so much load. –  Joey Oct 10 '13 at 8:31
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Try using the Process Explorer tool from SysInternals (via Microsoft) as this gives much more information about running processes: technet.microsoft.com/en-us/sysinternals/bb896653.aspx –  Richard Oct 10 '13 at 8:41

2 Answers 2

up vote 0 down vote accepted

If your high CPU usage is not being caused by malware, as you already mentioned in your question, then your laptop may have an overheating issue. You can check this by installing a CPU temperature monitoring application like SpeedFan.

If your CPU temperature is too high that might mean that it is time to bring your laptop to a computer repair technician for routine maintenance to clean out the dustballs from the aluminum cooling block next to the CPU fan. Or else, as a temporary fix, you can put an external laptop cooling pad underneath your laptop.

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I am using a laptop cooling pad also the laptop works in an AC room.But while gaming the laptop gets overheated sometimes.But the problem, is for instance i just started to game now say about 5 min back but still the problem occurred about 5 times or so. –  Krishna Chandran Oct 11 '13 at 9:00
    
Have you tried installing an application to monitor the CPU temperature? This would give you more information that would help you decide whether it is worthwhile to have the aluminum cooling block cleaned, which is a routine and inexpensive maintenance job. –  karel Oct 11 '13 at 9:15
    
:Thanks for the reply.I had one earlier now i don't have one.I will install one and inform you the details. –  Krishna Chandran Oct 11 '13 at 10:29
    
I have had some experience with a Dell XPS laptop. A CPU temperature of 42-56 degrees C is normal for this laptop under conditions of normal use, more than that when playing a game. A CPU temperature of more than 70 degrees is too hot. –  karel Oct 11 '13 at 11:13
    
:As i have mentioned i am using i7 so temp normally is in the range of 50-65.Now i have noted that during the problem the temp was 1st core-81 deg 2nd core-83 deg and the GPU temp was 63 deg. –  Krishna Chandran Oct 11 '13 at 11:54

I have solved my PC performance issue by disabling all unwanted start up programs(i had a lot of start up programs) which were running in background using the physical memory.I also deleted a lot of extensions and plugins in browser which were unused.

I ran a complete system scan with avast.Then i installed "Super Anti Spyware" which was useful in removing a lot of tracking cookies and other unwanted stuffs spying on us.I also installed "Malwarebytes Anti-Malware" and removed a lot of unwanted registry key entries and other malwares.

Now the system is performing well.Now for better performance and reducing temp. of the system i would have aluminum cooling block cleaned by giving to service center.

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