How long does it take to scan 350 GB of files?

Hello Sherry - 
 
Thanks for your response.  At over 31.5 hours, and still scanning, this does seem excessive to me.  I hate to stop it prematurely, however, because Webroot registered a "threat" - but in a problematic way - and I wanted to run a full scan to see if that was a false positive (which I suspect it was).  The initial "threat" alert came while scanning the TM yesterday - but at about only 1 hour of scanning (so I ought to be beyond that place by now).  Also, yesterday's alert came immediately after the TM popped up a window telling me that it had deleted some files to make more room for future back-ups. (I had forgotted to turn off the TM while I was scanning it, and it did a back-up unnoticed by me).  So at about the same time, I got a TM notice of deleted files, and a "Threat alert" on the scan.
 
After that alert, I selected "Remove threats" - but the page that then opened listed no threats, however the "Block/Allow" page did list a file to watch.
 
So I concluded a false positive because of the TM actions - but Webroot was then frozen and unresponsive.  I restarted the Mac, which unfroze Webroot, and initiated a new scan - including a full scan of the TM drive, hoping to thereby clear the RED "Threat Detected" warning on the Webroot page.  After I passed the one hour, with no threats detected, I thought maybe I was OK - and still after all these hours, still no "new" threats or "Total detections" register - the number remains 0 (zero) indicated in the Scan Window.  But still the RED warning "Threat Detected" with the white hand on a red circle remains on the main Webroot window.
 
Maybe all of this can help [user=17149][/user] answer the post.
 
Thank you.

Hello McThomas,
Scanning Time Machine backups can take an extremely long time due to the way that apple backs up the information.  We have certain kinds of traces that will open every single binary on the disk to make sure it is safe, this however can take a really long time on Time Machine.  I would recommend changing your settings so that you do not scan mounted drives with WSA. In some cases, Webroot will detect a threat that is located on your backup, such as Time Machine. If the file are in the backup, then they cannot hurt your system. You would have to restore the files from the backup to get them on the system, and at that point the Real Time Shield in Webroot would find and remove them. Even though Webroot cannot remove these files, as space for newer backups is needed the older backups will be deleted. This will delete the threats from the backup as well.  Another option available to Time Machine users is to exclude the files and folders from being backed up by the Time Machine. You can add them to the exclusion list which will permanently block the files/folders from being backed up in the future. By doing this, the infected file will eventually be deleted from the backup over time and prevent it from ever getting re-introduced to the drive should it be installed on the computer again.  Please let me know if you have anymore questions or concerns.
Regards,