First it is "full system scan.txt" with the spaces, importantly could you find the folder ?
It should have been there if you did a full system scan as you mentioned previously. However, one proviso is that you have to have set the Expert Settings, More Details, Settings, Report file section to Generate the report file, image1.
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The folder may be hidden in your Operating System, I don't know if this is the same but the example I'm using is from XP:
- Ensure that you have enabled the 'Show Hidden Files and Folders' option and disable hide system files in Windows Explorer, Tools, Folder Options, Hidden files and folders, uncheck Hide extensions for known file types, etc. see image2.
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Have you changed any of the default settings on the Full System Scan ?
Are you running this every day as to be honest that is overkill, I run a scheduled Quick scan once a week. The more frequently you run scans the greater the chances of coming across this type of thing.
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- With a resident on-access antivirus like avast, the need for frequent on-demand scans is much depreciated. For the most part the on-demand scan is going to be scanning files that would be otherwise be dormant or inert. If they were active files then the on-access file system shield would be scanning them before being created, modified, opened or executed.
I have avast set to do a scheduled weekly Quick scan, set at a time and day that I know the computer will be on. If for some reason my system wasn't on, no big deal I will catch up on the next scheduled scan.
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I suspect that these other file detection might be the same as the others, after a while they too might no longer be detected,