I have the same issue.
This week many EPO reports ~45000 threats named "_" for ~800 managed Windows computers.
This threat is detected on %USERNAME%\Local Settings\Temporary Internet Files\Content.IE5\[RANDOM FOLDER]\[RANDOM JS/APSX/PHP/.....]
The even ID is 1051 > Unable to scan password protected
Actually I am deploying EPO Agent and VSE8.7 on my computers.
They have IE6 and some of them (not already managed by EPO) have VSE8.5.
That's why they reporting this threat.
The KB explain that you have solutions:
- Upgrade your VSE8.5
- Upgrade your IE6
- Remove the alert 1051 from your request/dashboard