Bert -

I didn't think anyone but me was old enough to remember how we used to have to defrag stuff.

Kat -

I find two instances of the .edb file extension on my machine. Both are in sub-folders of the place where Microsoft Automatic Update keeps track of what has been added to your machine. One is a "Program Catalog" database and the other is part of a "PC Health" utility that may be associated with Microsoft's beta malware remover, or may be part of the "Help" system built into Windows.

The parent folder for both files is tagged as hidden, system, read only, and all "Properties" tabs are disabled because the files are "used by the operating system." ALL such files generally are shown as "cannot be moved" by Windows defrag.

Windows defrag generally doesn't even report a fragmentation condition for any such files, but might report these database files since the files themselves are not tagged. Since they're in subs of unmovable folders they should "inherit" a "don't bother" status from the unmovable parent folder. If you've felt you have to have some other "super defraggerator" some other programs may report the condition, but shouldn't attempt to move either of these files.

If either of these, DataStore.edb or HCdata.edb, is the .edb file you're seeing, you should ignore the report, and leave them alone. They're system files that shouldn't be moved by defrag.

John