BSOD on WIn Vista (Dell Inpiron 1525)

Help - my Dell is having continued BSOD today! This is the error I'm getting this:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6001.2.1.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: 50
BCP1: FB209FE8
BCP2: 00000001
BCP3: 8252596B
BCP4: 00000000
OS Version: 6_0_6001
Service Pack: 1_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\Mini121009-02.dmp
C:\Users\Kate\AppData\Local\Temp\WER-146765-0.sysdata.xml
C:\Users\Kate\AppData\Local\Temp\WERB9BD.tmp.version.txt

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Can anyone help please?