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Cpu Usage At 100% - Explorer.exe Problem?


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#1 gezkc

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Posted 11 April 2007 - 03:47 PM

Hi,
Over the last couple of months my computer has dramatically slowed down, so much so that it's virtually unusable at times. It's fine at first, but if I use it for an extended period (say an hour), it starts to really slow down. Checking in task manager, it shows that the CPU usage is 100% and explorer.exe is at over 90, even with no applications running. If I then shut down the computer and restart it, it seems ok again.

I've got a Celeron 2800MHz with 1504Mb RAM and Norton Internet Security 2005 (updated). I've run a virus scan using Norton and it's found nothing. I also ran Spyware Blaster and Adaware SE and they found some tracking cookies which they deleted, but nothing else. I've also run Disc Cleanup and defragged my hard drives (there are 2), but it hasn't changed anything
.
Do you know what could be causing this slowdown to happen?

Any help would be much appreciated!
Thanks.

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#2 tg1911

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Posted 11 April 2007 - 04:40 PM

Run these online virus scanners:
BitDefender
Trendmicro Housecall

Also this online Trojan scanner:
TrojanScan

Where is explorer.exe located?
MOBO: GIGABYTE GA-MA790X-UD4P, CPU: Phenom II X4 955 Deneb BE, HS/F: CoolerMaster V8, RAM: 2 x 1G Kingston HyperX DDR2 800, VGA: ECS GeForce Black GTX 560, PSU: Antec TruePower Modular 750W, Soundcard: Asus Xonar D1, Case: CoolerMaster COSMOS 1000, Storage: Internal - 2 x Seagate 250GB SATA, 2 x WD 1TB SATA; External - Seagate 500GB USB, WD 640GB eSATA, 3 x WD 1TB eSATA

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#3 gezkc

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Posted 16 April 2007 - 11:05 AM

Hi,

I've now run Trendmicro Housecall (it found 2 grayware items and removed them and several vunerabilities within Microsoft Office programs) and also TrojanScan (it didn't find anything using Smartscan).

I wasn't able to scan with BitDefender though - when I tried using it, I received a message saying "Failed to load interface -- You must have administrative rights on this computer; you also must have the Internet Explorer security settings to the Medium level". I've checked and my Internet Explorer security settings are at Medium level. Could my Norton Internet Security be interfering with this?

I've got 3 instances of explorer.exe on my pc when I search using Windows Explorer:
EXPLORER.EXE in C:\WINDOWS
explorer.exe in H:\WINDOWS (which I think is the one that's hogging all the system resources)
EXPLORER.EXE-082F38A9.pf in H:\WINDOWS\Prefetch

What do I need to do to be able to run BitDefender?

Thanks again.
Gez

#4 tg1911

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Posted 16 April 2007 - 03:25 PM

I suggest you go ahead, and post a HijackThis log for examination.
A member of the HijackThis Team will walk you through, step by step, how to disinfect your computer.

Once you post your log, don't make any changes to your system, as that could change the results of the posted log, making it more difficult to properly clean your system.

Read Preparation Guide for use before posting a HijackThis Log.
Please read, and follow, all directions carefully!!!

If the steps, prior to the posting of a HijackThis log don't eliminate the problem:

Run a log, and post it in the HijackThis forum, >at this link<.
Do not, post it in this topic.
Do not, fix anything, yet.
A member, of the HJT Team, will help you out.
It may take a while to get a response from the HJT Team, because they are very busy. Please, be patient, as these people are volunteers. They will help you, as soon as possible.

NOTE:
Once you have made the post, please, DO NOT make another post in the HJT forum, until it has been responded to by a member of the HJT Team. The first thing they look for, when looking for logs to reply to, is 0 replies. If you make another post, there will be 1 reply. The team member, glancing over the replies, might assume someone is already helping you out, and will not respond. So, just make your post, and let it sit there, until a team member responds. This way you will be taken care of, in the most timely manner.

If you haven't heard back from them in 5 days, go to this topic, Haven't Had A Reply In Five Days?, and carefully follow all directions.
MOBO: GIGABYTE GA-MA790X-UD4P, CPU: Phenom II X4 955 Deneb BE, HS/F: CoolerMaster V8, RAM: 2 x 1G Kingston HyperX DDR2 800, VGA: ECS GeForce Black GTX 560, PSU: Antec TruePower Modular 750W, Soundcard: Asus Xonar D1, Case: CoolerMaster COSMOS 1000, Storage: Internal - 2 x Seagate 250GB SATA, 2 x WD 1TB SATA; External - Seagate 500GB USB, WD 640GB eSATA, 3 x WD 1TB eSATA

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#5 gezkc

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Posted 17 April 2007 - 12:51 PM

Ok, will do.

Thanks. :thumbsup:




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