Get below mentioned error, this are the details from Event Viewer Application section.
When i get this error my internet stops working.
I'm unable to disconnect also when this happens.
Only option remains is to restart the system.

What u experts think is it ISP problem or my system or OS problem?

I have broadband connection.
OS: Windows XP Corporate Edition SP2
Antivirus: AVG 8 Free Updated

Details of Error:-
Event Type: Error
Event Source: Application Error
Event Category: (100)
Event ID: 1000
Date: 11/2/2008
Time: 9:15:07 PM
User: N/A
Faulting application svchost.exe, version 5.1.2600.2180, faulting module netapi32.dll, version 5.1.2600.2952, fault address 0x00018809.

VINOD MORELinux System AnalystAsked:
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Joseph DalyCommented:
Just a quick question have you updated to the ms08-067 security patch that was just released?
Joseph DalyCommented:
The reason I am asking this is because this update patches this netapi32.dll and the newest version is 5.1.2600.2976

VINOD MORELinux System AnalystAuthor Commented:
Downloaded, i'll patch it.
But started getting this problem from last one week.
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You can also update to SP3.
xxdcmast is quite correct, this is the MS08-067 vulnerability being exploited and, in the cases of the event log entries failing causing the svchost.exe (probably the Server Service) to crash.

What you don't see is whether there were any successful attempts to exploit this vulnerability.  I'm not completely certain, but I think it unlikely that your Anti-Virus solution would detect and prevent such exploits and so you perhaps should assume that there was a successful exploit and that you may be running malware dropped by Trojan-Spy:W32/Gimmiv.A or Exploit.Win32.MS08-067.g

As well as patching your box I'd advise you to head to an online virus scanner of one of the companies who are currently detecting these exploits, such as
By the way, are you using a firewall?
VINOD MORELinux System AnalystAuthor Commented:
Its home PC. No Firewall. jahboite
If you are really not using a firewall and you are not behind a device that perfoms Network Address Translation (thereby preventing connections to your windows machine initiated by hosts on the internet) then you are exposing your computer to numerous threats from the internet - not just the MS08-067 worms.

I'd advise heading to , read the blurb before Proceeding and then perform an "All Service Ports" scan.  This will show you whether your public interface to the internet responds to connection attempts from the internet and any services that might be exposed.

For instance, if TCP port 445 is marked as Open then there's all sorts of information about your computer available to anybody that connects to that port and is also one of the ports used by the MS08-067 worms.

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VINOD MORELinux System AnalystAuthor Commented:
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