In order to minimize potential false positives, we recommend clearing your web browser's cache and compacting your Thunderbird mailboxes:

• If you use Internet Explorer - clear the browser cache
  • Version 6: i. Open Internet Explorer
    • Click the "Tools" menu
    • Click "Internet Options"
    • Click "Delete Files"
    • Click "OK"
  • Version 7 or 8:
    • Open Internet Explorer
    • Click the "Tools" drop-down in the upper right
    • Click the "Delete Browsing History". If this option does not exist, click the "Safety drop-down in the upper right instead of "Tools"
    • If given the option, verify that "Temporary Internet Files", "Cookies", and "Form data" are selected
    • Depending on the version, click "Delete Files" or "Delete" ]
    • Click "Close"

• If you use Firefox - clear the browser cache
  • Open Firefox
  • Click "Tools
  • Depending on the version, either click "Clear Private Data" or "Clear Recent History". If given a choice of a time range to clear, choose "Everything"
  • If you see an arrow next to the word "Details" click that
  • Place a check in the box next to "Cache"
  • Depending on the version, either click "Clear Private Data Now" or "Clear Now"

• If you use Thunderbird - compact the mailboxes
  • Click on "Local Folders" along the left column
  • Click the "File" menu
  • Click "Compact Folders"