continual system crash

My PC crashes 2-3 times a day and produces this error message.

MCCode: 40000080 BCP1: 84ECB130 BCP2: 85069F30 BCP3: F7901F30
BCP4? 00000001 OSVer: 5_1_2600 SP: 2_0 Product 768_1

To view technical information about the error report click here

C:\DOCUME~1\POOLFA~1\LOCALS~1\Temp\WERd94a.dir00\Mini041207-01.dmp
C:\DOCUME~1\POOLFA~1\LOCALS~1\Temp\WERd94a.dir00\sysdata.xml

How can I fix it permanently please?

Thanks Frustrated