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System Slowdown Problems

I have XP Pro SP1 with 256M of memory.  I have run scandisk, defrag, virus scan, spyware scan (all updated), IE reinstall, HijackThis.
All problems found have been eliminated but I still have an occasional (at least once per day) system dropout for five minutes or more.  It appears to be only after connectng to my dial-up connection.  One attempt at solving it was at http://www.experts-exchange.com/Operating_Systems/WinXP/Q_21047441.html
I have since discovered what I believe is happening but I still don't know why.  I looked at the error logs and the System log indicates a problem with DCOM, but this does not seem to happen every time that the dropout occurs.  I looked at the Security log and it shows a number of the following errors (10 to 25)

User Logoff:
       User Name:      ANONYMOUS LOGON
       Domain:            NT AUTHORITY
       Logon ID:            (0x0,0x2D1FD51)
       Logon Type:      3

Successful Network Logon:
       User Name:      
       Domain:            
       Logon ID:            (0x0,0x2D1FD51)
       Logon Type:      3
       Logon Process:      NtLmSsp
       Authentication Package:      NTLM
       Workstation Name:      KLINK
       Logon GUID:      {00000000-0000-0000-0000-000000000000}

Privileged Service Called:
       Server:            Security
       Service:            -
       Primary User Name:      SLink
       Primary Domain:      SLINKHOME
       Primary Logon ID:      (0x0,0x2CEFA2F)
       Client User Name:      SLink
       Client Domain:      SLINKHOME
       Client Logon ID:      (0x0,0x2CEFA2F)
       Privileges:      SeIncreaseBasePriorityPrivilege

Privileged Service Called:
       Server:            Security
       Service:            -
       Primary User Name:      SLINKHOME$
       Primary Domain:      SL-LAN
       Primary Logon ID:      (0x0,0x3E7)
       Client User Name:      SLink
       Client Domain:      SLINKHOME
       Client Logon ID:      (0x0,0x2CEFA2F)
       Privileges:      SeShutdownPrivilege

Special privileges assigned to new logon:
       User Name:      
       Domain:            
       Logon ID:            (0x0,0x2CEFA2F)
       Privileges:            SeChangeNotifyPrivilege
                  SeBackupPrivilege
                  SeRestorePrivilege
                  SeDebugPrivilege

Successful Logon:
       User Name:      SLink
       Domain:            SLINKHOME
       Logon ID:            (0x0,0x2CEFA2F)
       Logon Type:      2
       Logon Process:      User32  
       Authentication Package:      Negotiate
       Workstation Name:      SLINKHOME
       Logon GUID:      {00000000-0000-0000-0000-000000000000}

I can't find an indication of exactly which virus or trojan could cause this (if any) and therefore can't remove it.  Any ideas?
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slink9
Asked:
slink9
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1 Solution
 
Huseyin1Commented:
can you reinstall IE and/or your ISP and your modem, take it out, restart and then shutdown then reseat the card and install.
H
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Cyber-DudeCommented:
Try to add the following line to the system.ini file located under <C:\Windows or any other <SystemRoot\>>
[386enh]
Irq14=4096

Save the file and restart...

Can you feel any effect?

Cyber
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nobusCommented:
did you run DCOMbob.exe? find it at :   http://www.grc.com/dcom/

nobus
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slink9Author Commented:
I have applied the IRQ14 and DCOM changes.  I will give it a week for more comment and to see if it is fixed.  It did not happen on this connect but it is sporadic and once seemed to be fixed for about five days straight.

Thanks.
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slink9Author Commented:
Nope.  It didn't help.  I just had this happen again.  Any more ideas?
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nobusCommented:
did you try DCOMbob.exe?

nobus
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Cyber-DudeCommented:
It can be due to a mislead in writing data to the disk.
See if the hard drive is 'bussy' OR it is not so bussy and yet, the OS still lacks of performance...

Cyber
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slink9Author Commented:
I tried both and it seems not to be fixed.

This is an Athlon 1.7 with 256M, 60G and 120G hard drives.  There is no system activity when this happens - no hard drive or internet (at least according to the taskbar icon) activity.
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nobusCommented:
you can still try running sfc :
RUN- SFC /scannow
have your xp disk ready !

nobus
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nobusCommented:
and what virus /spyware /adaware progs did you run? Maybe you missed one?

nobus
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slink9Author Commented:
I have run spybot and adaware.  I have also run bitdefender, avg, and occasionally housecall or symantec online scanners.

I am running Windows Update again and it is installing eleven things.  Maybe that will help.
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nobusCommented:
you can try RAVantivirus (i have seen good results)

http://www.ravantivirus.com/scan/

nobus
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slink9Author Commented:
Running Windows Update seems like it may have helped some but I still have disconnects quite often.
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slink9Author Commented:
The five minute thing still does not seem to be solved.  I was thinking that it started after installing Bitdefender so I uninstalled it.  Still no fix.  Actually, Bitdefender was installed as one of the attempts to fix this.  I may or may not reinstall that.  Now trying an online scan again ...
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slink9Author Commented:
Still not fixed.  This is about the third question on it.  Is this unfixable?
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nobusCommented:
Tell me slink9, what came it up with?

nobus
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slink9Author Commented:
I am guessing this will someday be resolved when I can get DSL.  No idea what the actual problem is.  It seems to be solved by totally disabling many of the services.  These also disabled internet sharing, which won't work.
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nobusCommented:
Well, it still can be a faulty modem,; did you swap it or test it on another machine?

nobus
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slink9Author Commented:
I have swapped modems, updated drivers and other hardware attempts.  If it were a faulty modem I would expect it to be every time.  I had the phone line verified and was told that there does not appear to be a problem there, either.
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