There are cases known on this forum where, for some unknown reason, there was a gigantic30 GB file in the System Volume Information folder. And toggling System Restore didn't help against that.
As you will have noticed that folder normally is inaccessible to Treesize. A rather special command line program is needed to grant you access to that folder. It's called icacls and it's present in Windows. It has a help (icacls /?) and google can find more help. But you need to know some basics about using the command prompt and how to handle paths with spaces (by enclosing them in quotes).
The command (copy/paste it to Notepad to see the spaces, which are necessary!) is:
icacls "\system volume information" /g yourusername:r (end with enter)
With "yourusername" I mean your Windows logon name.
Then,
in Control Panel>Folder Options>View uncheck the "hide protected
system files". Then you can have a look at what it contains with Windows Explorer or My
Computer (use right click properties to see file size used)
When you know what you want to know:
- hide the protected operating systems files again
- undo the icacls command by the following variant:
icacls "\system volume information" /r yourusername /e
It could be that booting from an Linux Live CD would give you access to that folder also, but I never tried.
If chkdsk finds no problems with the file system, you should be able to account for every sector used after some work.
Kees
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