Scan with Trend Micro indicates infection with rtkt_agent.err.

dholsomback used Ask the Experts™
It indicates file name is efdb.sys in windows\system32, but I cannot delete this file.  Any suggestions?
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I don't know what efdb.sys is but if you've deemed it to be safe to delete, first try Safe Mode. If you can't delete it there either, you can use Winternals ERD Commander (Microsoft Diagnostics and Recovery Toolkit) or BartPE to boot into a windows-like environment and delete the file. Also run through the registry and make sure there is no entry for it so you don't get errors during startup.
Sudeep SharmaTechnical Designer

Get a copy of Autoruns from Microsoft and search for the efdb.sys

Remove it once found, or else if you face any difficulty working with the autoruns then you could just save the autorun entries of you system and post it here. To save the autorun entries do the following:
Click --> File --> Save.

Name the file "filename.arn" (filename could be any name)

You might want to zip the arn file before posting it here for further analysis.

Top Expert 2009
Try Tdsskiller and Hitmanpro. If it is being deemed as a rootkit then one of them has a good chance of detecting and removing

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