Vista - Fault bucket X64_0x9F_IMAGE_nvmfdx64.sys, type 0

Please review and help,
my computer and for almost 3 times shut down with a note that the reason for
this shut down is to prevent the computer from crashing due to an error!!

please review and advice

thank you

Log Name: Application
Source: Windows Error Reporting
Date: 1/22/2009 6:44:34 AM
Event ID: 1001
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: EMAN
Description:
Fault bucket X64_0x9F_IMAGE_nvmfdx64.sys, type 0
Event Name: BlueScreen
Response:
http://oca.microsoft.com/resredir.as...E_nvmfdx64.sys
Cab Id: 0

Problem signature:
P1:
P2:
P3:
P4:
P5:
P6:
P7:
P8:
P9:
P10:

Attached files:
C:\Windows\Minidump\Mini012209-01.dmp
C:\Users\Owner\AppData\Local\Temp\WER-105082-0.sysdata.xml
C:\Users\Owner\AppData\Local\Temp\WERC6C7.tmp.version.txt

These files may be available here:
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\Report0a3b075f
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Windows Error Reporting" />
<EventID Qualifiers="0">1001</EventID>
<Level>4</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-01-22T11:44:34.000Z" />
<EventRecordID>17790</EventRecordID>
<Channel>Application</Channel>
<Computer>EMAN</Computer>
<Security />
</System>
<EventData>
<Data>X64_0x9F_IMAGE_nvmfdx64.sys</Data>
<Data>0</Data>
<Data>BlueScreen</Data>

<Data>http://oca.microsoft.com/resredir.aspx?sid=13805&Bucket=X64_0x9F_IMAGE_nvmfdx64.sys</Data>
<Data>0</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
</Data>
<Data>
C:\Windows\Minidump\Mini012209-01.dmp
C:\Users\Owner\AppData\Local\Temp\WER-105082-0.sysdata.xml
C:\Users\Owner\AppData\Local\Temp\WERC6C7.tmp.version.txt</Data>

<Data>C:\ProgramData\Microsoft\Windows\WER\ReportArchive\Report0a3b075f</Data>
</EventData>
</Event>

Please review and help,
my computer and for almost 3 times shut down with a note that the reason for
this shut down is to prevent the computer from crashing due to an error!!

please review and advice

thank you

Log Name: Application
Source: Windows Error Reporting
Date: 1/22/2009 6:44:34 AM
Event ID: 1001
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: EMAN
Description:
Fault bucket X64_0x9F_IMAGE_nvmfdx64.sys, type 0
Event Name: BlueScreen
Response:
http://oca.microsoft.com/resredir.as...E_nvmfdx64.sys
Cab Id: 0

Problem signature:
P1:
P2:
P3:
P4:
P5:
P6:
P7:
P8:
P9:
P10:

my computer shut down auto with a note that the reason for that is to prevent
it from crashing, please advice