Hello,

What version of SEP are you running on the Machine?

Check this Thread:

https://www-secure.symantec.com/connect/forums/windows-vista-blue-screeen-sep-srtspl64sys

https://www-secure.symantec.com/connect/forums/0x00000050-srtspl64sys-restarts-computer-all-time-when-login

Through the release notes from Symantec site refers to be issue with 2008, make sure you running the latest version though ( RU6 MP1)
http://www.symantec.com/business/sup...7&locale=en_US
SRTSPL64.SYS crashes on Windows 2008 Server
Fix ID: 1949035
Symptom: BugCheck 50, PAGE_FAULT_IN_NONPAGED_AREA, in SRTSPL64.SYS
Solution: Fixed resource cleanup issues
However, In cases of BSOD, you would have to collect the Full Memory Dump files and create a Case OR contact Symantec Technical Support.
How to create a new case in MySymantec (formerly MySupport)
http://www.symantec.com/docs/TECH58873
How to update a support case and upload diagnostic files with MySupport
http://www.symantec.com/docs/TECH71023
OR
Regional Support Telephone Numbers:
  • United States: 800-342-0652 (407-357-7600 from outside the United States)
  • Australia: 1300 365510 (+61 2 8220 7111 from outside Australia)
  • United Kingdom: +44 (0) 870 606 6000
Additional contact numbers: Contact Business Support
Hope that helps!!