I basically have no answer to your question,unfortunately. I have noticed "Stinger" does indicate ePO 32 bit,and ePO 64 bit Downloads. Possibly someone with more knowledge in regards to your question,will pick up this thread.
During the meantime,you may try the Superb Getsusp Tool to scan with. It detects Suspicious/Unknown files that other programs fail to do so. Simply remember to add your email address under "( Preferences ) before scanning.
This and other Superb (Free) Tools can be found below my Signature ( Second Link )
You should recieve an confirmation that McAfee Labs have recieved your submission to be analyzed. Save the Analysis ID # for future reference.
All the very Best,
There is no way to make a bootable version of Stinger. What you describe sounds like imminent disc failure. Run a chkdsk /r as per these instructions: http://support.microsoft.com/kb/315265
If it fails then you need to look into replacing that hard drive.
Otherwise look at hints in the last link in my signature below.