Hello,
Bloodhound.Boot.String is a heuristic detection for processes based on certain attributes.
We suggest that you submit any such files to Symantec Security Response. For instructions on how to do this using Scan and Deliver, read Submit Virus Samples.
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.
AND
I would suggest you to run the SERT Utility in this Issue.
If you have access to Fileconnect, the SERT (Symantec Endpoint Recovery Tool) is useful in situations where computers are too heavily infected for the Symantec Endpoint Protection client installed upon them to clean effectively. The Consumer version of this tool is the Norton Bootable Recovery Tool. The tool is free, so there is no need for a Fileconnect account to download the software.
Reference:
Is your system infected? Symantec tools to help clear an infection
Secondly, I would also suggest you to create a case with Symantec Technical Support.
To Create a Case with Symantec Technical Support.
How to create a new case in MySupport
http://www.symantec.com/business/support/index?page=content&id=TECH58873
Phone numbers to contact Tech Support:-
Regional Support Telephone Numbers:
Australia: 1300 365510 (+61 2 8220 7111 from outside Australia)
United Kingdom: +44 (0) 870 606 6000
Hope that helps!!