Rundll32 cpu usage high

Hi.
Ive just upgraded my win 8.1 to win 10 technical preview. The first thing that bugged me was the process rundll32. It has high cpu usage (40-50% of my cpu). It didnt have that on win 8.1, and i havent done anything other than upgraded to win 10. Anyone else
having trouble with this?

Until you have RTM you can be surprized...
To dig deeper try to use Sysinternals tools, namely Process Explorer is you primary tool (hope is will work in W10):
https://technet.microsoft.com/cs-cz/sysinternals/bb896653.aspx
HTH
Milos

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MBP with 10.6.8: CPU usage high, no responsible processes shown in Activity Monitor. What causes this?

After using my computer for some time, CPU usage climbs to about 90% (ca. 65% user / 26% system) and fans run at high speed, but there is no processes that seem to use CPU (other than Activity Monitor itself ~1%).
This has happened a few times recently. It happens when I've used my computer for some time, hours or a couple of days (I usually put my computer to sleep when not using it but rarely shut it down). I've tried to quit all running apps incl. Growl, Dropbox, and anything that could be responsible to this but with no results. Putting computer to sleep for a long time doesn't help, cpu usage will climb instantly after wake up. Restarting system is the only thing that helps.
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My MBP is 15" model with Core 2 Duo 2,66 GHz (MacBookPro 5,3), OS X version is 10.6.8, all available updates are installed.

Perform a SMU reset.
https://support.apple.com/kb/HT3964
Remove the anti-virus, it's running a root level process all the time that's taking your CPU and it's not necessary as there are no Mac viruses, Apple has the trojan angle covered already.
Always on anti-virus on a Mac is always a source of problems, also is MacKeeper, uninstall that here if you have it.
http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/
If you need to clean the Windows filth off PC files, then use the free, run as you need, ClamXav.
http://www.clamxav.com/
It seems your machine is used in a corporate enviroment, thus likely a rule that anti-virus must be used, you can avoid high CPU usuage by using the ClamXav instead.

3.2 - CPU usage high

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Version 3.2.09/Build MAIN-09.23
Edited by: jnp1234 on Aug 28, 2012 7:01 AM

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CPU usage High

Hi,
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hrishy wrote:
Hi
Why so much time is being spent in CPU ?
Apologies the rich text editor is not working and i am unabel to format this code properly
Rows Operation
______0 NESTED LOOPS (cr=117469550 pr=444 pw=0 time=1670966102 us)
(snip)
______0                    NESTED LOOPS (cr=117469550 pr=444 pw=0 time=1670965844 us)
462,472                       NESTED LOOPS (cr=1389078 pr=196 pw=0 time=12429546 us)
(snip)
______0                       TABLE ACCESS FULL CON (cr=116080472 pr=248 pw=0 time=1889064945 us)
(snip)
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Charles Hooper
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http://hoopercharles.wordpress.com/
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K&M Machine-Fabricating, Inc.

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Guys Please Help me!!!
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http://prntscr.com/4imrae

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Guys Please Help me!!!
I have installed windows 8.1 using Bootcamp. And each time I open my Task manger the Cpu usage spikes to 100 and return to normal. I searched internet several hours. I installed antivirus but it didn't help me.
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http://prntscr.com/4imrae
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Sorry for the edit error.
I mean "patched with 10.1.0.3".

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Rundll32 cpu usage high

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