4th option will not work for you if hdd is fully encryption (it must be encrypted that why the safeboot was there)
and now you will require Saftech Cd or Wintech Cd and .sdb file from server to restore EEPC (safeboot) MBR
Okay, thank you. I'm not sure which is more ironic - that McAfee did not prevent a virus from infecting my laptop, and in fact it is the Endpoint Encryption that is now infected, or that Endpoint Encryption now prevents me from taking the simple steps I used previously to get rid of viruses - Safe Boot and Restore.
Virus has changed your MBR (SBR) which was gate for accessing you encrypted HDD. now that is not there so now you can not access you hdd as you can not authenticate as Preboot screen is not there
can you tell us which virus you have, and of course, what McAfee protection you are using? (VSE, HIPS, Artemis etc).
But unfortunately, you are up the creek until your helpdesk comes back online - only they have the necessary info to recover their machine.