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custom scan won't stop, delete button greyed out

I have OSX version 10.8.4 and have been advised by my server that my Mac Pro has a trojan virus Conflcker.  I have had the same problem as many people here running a "Scan this Mac" - it simply stops at about 25% and hangs.  So I uninstalled Sophos, downloaded and installed it again and ran custom scans on my folders a few at a time.  This worked fine and I have almost finished scanning everything.  No threats have been identified, only issues which were corrupt or missing files, so I deleted those files.

But then I decided to scan the Library, and made the mistake of trying for the whole library at once and the problem occurred again - scan would not finish.  The delete button at the botton (-) is greyed out and there seems to be no other option for ending the scan.  So I tried for another custom scan and selected just a few folders.  This time it's not getting past he barber pole.  I can't seem to stop either scan.  If I quit Sophos it quits OK but then when I open it again it's still churning away at the two custom scans but not progressing.  I have gone into the scan settings but the option to untick scan inside archive files is greyed out.

Am not an IT person so would appreciate any help

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  • From Spotlight (the magnifying glass icon in the top right) type 'Activity Monitor' and press enter.

    Click on the '% CPU' column a couple of times so the processes using the most CPU are at the top.  It'll be at the top but the process you're looking for is 'SophosAVAgent'.  Select it and click the 'Quit Process' red button near the top left of the Activity Monitor program and then just click 'Quit' - 'Force Quit' if it has really hung.

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  • This worked to stop the scan.  However Sophos has basically stopped working.  Every scan I do, even on the smallest file, is stuck on "calculating" - I am going to try ClamX instead.

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  • Just before you go, you could try restarting the computer and make sure everything loads correctly on reboot.

    Also there is SAV version 9 available and upgrading from version 8 can be done over the top - not sure what version you have installed at the moment.  If it is already SAV 9 then uninstalling and resintalling can help too - the installation may just need to be reset - don't let one bad install put your off forever.

    There a loads of people with happy installs of SAV for Mac, but when it doesn't work for you it's tempting to quickly look for another application to replace it - thinking that it's the new application when it could be an underlying problem with the computer (something that repairing disk permissions could resolve - that's a 'dummies link please don't be offended :smileyembarrassed:).

    You're doing the right thing by looking for antivirus software to protect yourself, gives you peace of mind and that meets your needs - good luck.

    :1013132