Probably a dumb question but here it is: I'm trying to get a count of all files on my c:\ drive. In Dopus, if I highlight all of the folders immediately below c:, and right click properties I get a number of 254,835. If, on the other hand, I do Find > Name matching=* > Tick Wildcards > Type=Files then I get 263,857. The difference, 9,022 is the number of files in folder c:\program data. In c:\users there is a shortcut ("All Users") which points to folder c:\program data. So, as unlikely as it seems, I am wondering whether Dopus is double counting the contents of that folder first as the folder and second as a link to it. Dopus isn't likely to make an error like that so please can you advise where I am going wrong?
Things that count files may avoid double-counting things through junctions / softlinks, etc. (In Opus, that's optional when using the folder size and file count columns. The Properties dialogs, on the other hand, are up to Windows.)
Things that find files (like Tools > Find Files) generally return a match of everything that matches the query, including through junctions / softlinks, and generally list the same physical file twice if two logical instances of it match what you searched for (as it should; it's finding things, not counting space, and both things match the query).
So if you're just seeing a difference due to a folder that is in two places at once, via a junction, then that would be completely normal and expected.
Some other ways that could cause differences when counting files in different ways:
There are also lots of special folders on C:\ that are probably being excluded by one thing or the other. You may also have filters active in Opus that are hiding files even though they are in the results.
The Properties dialogs in Windows 10 were also broken recently. I'm not sure if Microsoft have fixed them yet, but their numbers may still not be reliable.