First Scan Failed

• Running 10.6.4
• Removed Intego Antivirus last night, using their uninstaller successfully.
• Installed Sophos
• Noted BootCamp Drive issue, so set custom scan to exclude it
• Ticked "include archives"
• Besides system drive, I included two external FW drives in the custom scan
• Began scan (SET TO REPORT ONLY), seemed to run fine.
• Activity Monitor reported CPU% was occasionally in high 90s, then down to 25% area and back, repeatedly.
• This did not slow down other computer activity, however.
• 10 hours later, the scan appears to be stuck  with app. the 500,000 something file on the system drive (began with over a million)
• Activity Monitor reports CPU for SophosAVAgent more or less pinned at 99-100% CPU
• HOWEVER, the system is not slowed down, I ran Firefox, Activity monitor, switched Spaces:  nothing is frozen and nothing seems sluggish despite the Activity Monitor's reading.
• Nothing in the Quarantine Manager
• Log shows hourly updates have continued to run all night.  No threats, 3 issues.  Corrupted files plus I also found another issue in another sophos log window generated about a dmg file with "unrecognized file format" message (mentioned by another poster on this forum about a week ago.)
• Force Quit does not show Sophos as unresponsive but I used it to quit anyway:  Sophos windows closed and Force Quit window no longer lists Sophos.
• BUT Activity monitor still showed SophosAVAgent (root user) pinned at 99-100% CPU
• SO, I selected SophosAVAgent and clicked on the stop sign "Quit Process" button of the Activity Manager, which worked.
• Menu Bar shield icon for Sophos still there and functional
• I ran sophos again on a single file, (the dmg file) and got the same report about unrecognized file format.
• I will now uncheck the "scan archives" choice and I will attempt to run custom scan (again excluding the BootCamp partition) on the system drive and then each of the firewire drives, ONE AT A TIME and will report on how that goes later.

That is my initial report.

TIA