100% CPU Usage When Using Dialup Connection

[Tagge]

Hey folks,

Have an interesting problem I've been as of yet unable to solve on a PC I'm supporting. Everything works smoothly when you're using the NIC to connect via broad band to the internet. However, when you turn around and try to use a dialup connection on the same machine (which is required b/c of it's location / uses), the machine will dialup and then lockup solid if you run msimn.exe (outlook express) and/or iexplore.exe (internet explorer). Or anything else related to internet access for that matter it seems.

I've tried replacing the modem thinking that was the culprit, replacing it with a known working/good one, and of course switching PCI slots when I did so.

I've scanned the PC with AVG AntiVirus, Norton (Online) Virus scan. As well as Spybot S&D (updated) and Ad-Aware 6 (lastest version). I've run HighJackThis! (lastest Version, again), and rummaged through the log file, finding nothing myself that would be incriminating or otherwise effect this machine IMO.

I've disabled Universal Plug N' Play thinking that could be a possibilty (or rather someone suggested it could be). Modified the startup removing all unnessicary program files, and gone through the services, finding nothing but the usual Windows XP bloat.

What does this all mean? I'm at the end of my rope as far as ideas go. The only thing that I think it could possibly be now is the motherboard having an IRQ handling problem for some reason. Does anyone have any other suggestions here? I would really be appreciative.

Here's the HighJackThis! Log if anyone's curious:

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVG6\avgserv.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\PROGRA~1\Grisoft\AVG6\avgcc32.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\Administrator\Desktop\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.rmcl.org/
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Acrobat\Reader\ActiveX\AcroIEHelper.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE NvQTwk,NvCplDaemon initialize
O4 - HKLM\..\Run: [AVG_CC] C:\PROGRA~1\Grisoft\AVG6\avgcc32.exe /STARTUP
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O9 - Extra button: Research (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Windows Messenger (HKLM)
O17 - HKLM\System\CCS\Services\Tcpip\..\{EAB673EF-8871-4ED4-BB2C-49D9BAA5C1B4}: NameServer = 200.200.200.17,200.200.200.12

NOTE: The last entry is the name servers that are running on the inside of our network FYI.

Thanks,
-T.

 

[Josh_B]

Try reinstalling the modem driver, or updating it.

It sounds like it might be a lovely WinModem with *gasp* crappy drivers.

Best of luck to you, sir.

 

[Phoenix86]

Gotta agree, winmodems use CPU cycles, so I would start there. Bad driver, BAD!

 

[Tagge]

Sorry folks,

Tried that one. Thought of that. I used the real USR modem drivers for this. No worries though, the Windows XP install got fried trying to fix this issue. So, I'm going to have to reinstall, that should solve the problem. Thxs for the help.

Peace,
-T.