Thanks, I'll definitely want to remove the folders, embuggerance or no.
I've made some progress at this end.
I ran the FileAssassin utility included in the AntiMalware program.
I was able to see and navigate the hidden structure and files.
I deleted all of the files in the bin folder.
I was able to rename the usr and bin folders to usr2 and bin2.
The usr2\bin2 folder structure (with no files) is stuck in my Recycle Bin.
When I try to do a final delete, I am told "access denied, file may be in use".
The C:\Avenger\knlps2\nul folder structure (with no files) is still present, access denied on the nul folder.
I ran a Quick Scan with Avast and found 1 malware threat:
C:\WINNT\system32\spool\drivers\w32x86\3\hpzstv01.exe
I was able to move the threat to the Chest with no problems.
I'm going to try re-booting the system to see if I can clear the Recycle Bin, then start a Full System Scan with Avast before I head off to work.
Will let you know how it turns out,
--Carl