Vista - Vista Media Center Recording Errors

Hello,
I have a client with a PC running Vista Ultimate who relies on the Vista
Media Center TV recording from a Dual Analog tuner using a cable signal
source.

The symptom is that the vast majority of scheduled recordings are split into
multiple pieces. The user was trying to clean up his pc so we clean
formatted the harddrive and clean installed Vista, and before installing any
applications we simply patched windows, installed the latest drivers
including for the TV Tuner, but the issue persists. The event viewer shows
entries similar to the following:

Log Name: Media Center
Source: Recording
Date: 5/5/2008 8:42:00 PM
Event ID: 3
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: xxx-PC
Description:
Recording of <showname> began late on 05/05/2008 20:28:01 due to a temporary
failure caused by either a system malfunction or a power loss and was stopped
due to a lack of audio/video data. Another recording attempt will be made.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Recording" />
<EventID Qualifiers="0">3</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2008-05-06T03:42:00.000Z" />
<EventRecordID>31</EventRecordID>
<Channel>Media Center</Channel>
<Computer>xxx-PC</Computer>
<Security />
</System>
<EventData>
<Data>Recording of <showname> began late on 05/05/2008 20:28:01 due to a
temporary failure caused by either a system malfunction or a power loss and
was stopped due to a lack of audio/video data. Another recording attempt will
be made.</Data>

<Binary>FFFFFFFFFFFFFFFF03000000075B810300000000150048006F0077002000490020004D0065007400200059006F007500720020004D006F007400680065007200020000000000000004004B004300420053000B005200650062006F0075006E0064002000420072006F00000007004300610062006C00650020004200A985CDAAC452E340866CF8EEC452E34060005700680065006E0020005400650064002000740065006C006C00730020005300740065006C006C006100270073002000730065006300720065007400200074006F0020007400680065002000670061006E0067002C0020006800650020006D00750073007400200066006100630065002000740068006500200063006F006E00730065007100750065006E0063006500730020006F006600200062007200650061006B0069006E00670020006800650072002000740072007500730074002E00000000000000000000000000000000000000000000000000000000010188FFFFFFFFFFFFFF00000000000000000700000000000000000000000000000000</Binary>
</EventData>
</Event>

The PC is a DELL E510 with 2GB RAM, plenty of hard drive space and is fully
patched (But not upgraded to SP1 because the SP1 audio driver is not ready
yet). The TV Tuner is identified in Device Manager as a "Angel MPEG Device"
and is made by Luminate, Inc.

I appreciate any help you can provide to help resolve this issue