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svchost.exe (NlaSvc, Dnscache, etc) Slowdown


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#1 RAPHelp

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Posted 23 June 2010 - 04:57 PM

Not a show-stopper but frustrating.

In my PC with Win7 have noticed a slowdown (<1 minute per instance) when 'going' to a URL (in FF) or 'Syncing' email (in WLM - Win Live Mail). Determined that one of the svchost.exe's was taking an inordinately long time to do it's thing and wondered if the time can be reduced.

Associated with the svchost are several services: NlaSvc, LanmanWorkStation, DNScache, and CryptSvc.

Searched Internet but wasn't sure if those services could just be disabled.

Scenario: have a Path-lock switch between incoming Internet and desktop. After being away from PC for an hour or more, switch disconnects Internet from PC, so I reconnect ... but ... while Win7 processes the reconnection immediately, I have to wait for about a minute before FF or WLM will handle a new URL or an email.

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#2 cryptodan

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Posted 27 June 2010 - 09:04 AM

Your switch or router could have a small NAT Table which when full doesn't allow for new connections until the NAT Table is clear and a reboot of the router or switch is required.

Can you tell us what kind of router you use?

For example, my router has a NAT Table size of 30K which can remember up to 30,000 simultaneous connections to the net, however, on the 30,001 connection my router would probably die.

#3 RAPHelp

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Posted 27 June 2010 - 01:30 PM

Router is a WRT54GS ver 6 Linksys - it is physically connected to my desktop (Dell Inspiron 545 - Win 7) - where the issue is ... and 'wirelessly' to wife's and to daughter's laptops
Thank you for the response

Had a problem with it recently when had no Internet 'signal' on physical connection but wireless was OK. (?)
ISP checked modem - was OK ... problem was corrected by doing a reset of the router (the svchost slowdown started before this issue). Related?

#4 cryptodan

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Posted 27 June 2010 - 01:35 PM

I would test the computer without the router involved at all, and try it directly connected to the cable modem.

Follow these steps:

1) Power off the computer

2) Power off the router by unplugging it.

3) Connect Computer directly to the modem.

4) Power up the modem.

5) Power up the Computer.

Use it for 24 hours like this and see if the issue resumes.

#5 RAPHelp

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Posted 27 June 2010 - 01:43 PM

Thank you - I'll try it

#6 RAPHelp

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Posted 27 June 2010 - 02:40 PM

did as directed ... not sure if results points to router ... will let run this w/o router for few hrs.

Here's what I did:
1. powered off PC..then modem.
2. disconnected router ... modem now connected through Path-lock switch to computer
3. powered on modem..then PC
4. started (WLM - Live Mail) ... same svchost took 50% of CPU for about 20-30 secs
5. when svchost finished, WLM 'synced' with Internet/ISP servers
6. I then launched FF ... said URL was loading - loading - loading ..............
7. C-A-D ... started Task Mgr - checked processes .... same svchost was taking 50% of CPU
8. after 20-30 secs, svchost finished and FF displayed URL

#7 cryptodan

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Posted 27 June 2010 - 03:05 PM

Remove the pathlock switch, and what is the path-lock switch I have been in networking for well over 10 years now, and this is the first time I have ever heard of a path-lock switch.

#8 RAPHelp

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Posted 27 June 2010 - 03:22 PM

PathLock switch is just a physical switch (with a timer) between the modem/router and computer to disconnect the Internet signal from the PC. It's basically a 'security' feature so the Internet isn't connected continuously .... it has a built in timer that flashes an LED after about an hour. - telling me it's about to disconnect. I have it connected in so that if I'm away from the PC for more than an hour it will disconnect the Internet.

I've had iot connect for more than 3 years and never had a problem.

Have connected the modem directly to the PC in the past - same svchost slowdown.

Edited by RAPHelp, 27 June 2010 - 03:23 PM.


#9 cryptodan

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Posted 27 June 2010 - 03:25 PM

Download and Run Process Explorer

Then take a screenshot of all the processes:

Post a Screenshot

use the below:

[img]linktoimage[/img]

Host it at www.tinypic.com or www.imageshack.us.

#10 RAPHelp

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Posted 27 June 2010 - 04:24 PM

Posted Image

svchost 1028

#11 cryptodan

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Posted 27 June 2010 - 05:03 PM

Can you put your mouse cursor over that and tell me what it says in the mouse over popup?

#12 RAPHelp

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Posted 27 June 2010 - 06:18 PM

right-clicked 1028 -> properties ... chose 'services' tab

Let me know if some other tab

Posted Image

#13 RAPHelp

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Posted 04 July 2010 - 03:58 PM

No response in a week - anything I can do?

#14 cryptodan

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Posted 04 July 2010 - 09:58 PM

sorry bout that I have been working long hours and long weeks. Can you disable your DNS Client and see if the issue goes away?

#15 RAPHelp

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Posted 05 July 2010 - 01:33 PM

no problem - understand long hours/days - but in past now ... good/bad?? miss it but glad it's over

back to issue:
disabling stops short hang - no svchost delay ... but will it slow down surfing, etc ?? will watch

Wiki says to only disable in extreme conditions.

did I do it right:
My Computer (right click)-> Manage -> Services and Appls -> Services -> DNS Client (changed from 'Auto' to 'Disable')

Edited by RAPHelp, 05 July 2010 - 01:34 PM.





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