CPU usage

Hi, since a few days my cpu has always cpu load of about 90 % at core 2.
Vista is very slow.

Taskmanager shows no applications with cpu usage.

Now i installed process explorer and i can see that 45% cpu usage (this
is 90% of core 2) is for "System / hardware interrupts".
Which interrupts are the problem, what can i do to fix this?

Regards
Stefan

Stefan Koschke <> wrote:
>
> Hi, since a few days my cpu has always cpu load of about 90 % at core 2.
> Vista is very slow.
>
> Taskmanager shows no applications with cpu usage.
>
> Now i installed process explorer and i can see that 45% cpu usage (this is
> 90% of core 2) is for "System / hardware interrupts".
> Which interrupts are the problem, what can i do to fix this?


That very much sounds like a rootkit.

Try this:

http://technet.microsoft.com/en-us/s.../bb897445.aspx

ss.

I've seen bad hardware or drivers cause those symptoms. Have you added any
new hardware or updated any drivers? You may get some clues if it's a driver
in this log.

Event Viewer
Applications and Services Logs
Microsoft
Windows
Diagnostics-Performance
Operational

--
Kerry Brown
MS-MVP - Windows Desktop Experience: Systems Administration
http://www.vistahelp.ca/phpBB2/


"Stefan Koschke" <> wrote in message
news:499fdeee$0$32672$...
> Hi, since a few days my cpu has always cpu load of about 90 % at core 2.
> Vista is very slow.
>
> Taskmanager shows no applications with cpu usage.
>
> Now i installed process explorer and i can see that 45% cpu usage (this is
> 90% of core 2) is for "System / hardware interrupts".
> Which interrupts are the problem, what can i do to fix this?
>
> Regards
> Stefan

"Stefan Koschke" <> wrote in message
news:499fdeee$0$32672$...
> Hi, since a few days my cpu has always cpu load of about 90 % at core 2.
> Vista is very slow.
>
> Taskmanager shows no applications with cpu usage.
>
> Now i installed process explorer and i can see that 45% cpu usage (this is
> 90% of core 2) is for "System / hardware interrupts".
> Which interrupts are the problem, what can i do to fix this?
>
> Regards
> Stefan



Run the Manufacturers diagnostic program on your hard disk.

Go to the website of the manufacturer of your hard disk.
Download their Diagnostic Program.
Run it.



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Colon Terminus schrieb:
> "Stefan Koschke" <> wrote in message
> news:499fdeee$0$32672$...
>> Hi, since a few days my cpu has always cpu load of about 90 % at core 2.
>> Vista is very slow.
>>
>> Taskmanager shows no applications with cpu usage.
>>
>> Now i installed process explorer and i can see that 45% cpu usage
>> (this is 90% of core 2) is for "System / hardware interrupts".
>> Which interrupts are the problem, what can i do to fix this?
>>
>> Regards
>> Stefan
>
>
>
> Run the Manufacturers diagnostic program on your hard disk.
>
> Go to the website of the manufacturer of your hard disk.
> Download their Diagnostic Program.
> Run it.
>

Hi,

thanks, but Samsung tool tells both drives have no errors :-(

Now i have to look at other points...

Ciao
Stefan

Synapse Syndrome schrieb:
> Stefan Koschke <> wrote:
>> Hi, since a few days my cpu has always cpu load of about 90 % at core 2.
>> Vista is very slow.
>>
>> Taskmanager shows no applications with cpu usage.
>>
>> Now i installed process explorer and i can see that 45% cpu usage (this is
>> 90% of core 2) is for "System / hardware interrupts".
>> Which interrupts are the problem, what can i do to fix this?
>
>
> That very much sounds like a rootkit.
>
> Try this:
>
> http://technet.microsoft.com/en-us/s.../bb897445.aspx
>

Hi,

this tool does not run under Vista?!

Stefan