Kernel data inpage error

Hi

When I leave my computer downloading, after a few hrs it always crashes to
the blue screen of death and and I get the Kernel data inpage error message.
I've looked in my even viewer and get the following messages with I click on
the red error icon ,
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="EventLog" />
<EventID Qualifiers="32768">6008</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2008-01-06T09:24:09.000Z" />
<EventRecordID>38464</EventRecordID>
<Channel>System</Channel>
<Computer>Peter-PC</Computer>
<Security />
</System>
- <EventData>
<Data>05:50:06</Data>
<Data>06/01/2008</Data>
<Data />
<Data />
<Data>20397</Data>
<Data />
<Data />

<Binary>D807010000000600050032000600C700D807010000 000600050032000600C700600900003C000000010000006009 000001000000B00400000100000000000000</Binary>
</EventData>
</Event>

I also have a yellow warning icon saying TCP/IP has reached the security
limit imposed on the number of concurrent TCP connect attempts.

After it crashes, these are the two messages that always appear in the event
log.

No matter what I try, my system is now crashing all the time when I leave it
to download.

Pls help