That can come up unknown. Try the usual and turn off system restore and back on. A new restore point is made and the space for all old points is reclaimed.
Can anyone please help me with a problem that's driving me nuts.
I am running Windows 7 on a 1 TB hard drive.
The total size of files/programmes on the hard drive is 497GB. But, I only have 41.9 GB free???
I have run WinDirStat, & it shows an "unknown" space of 434 GB. This section is a yellow colour, & does not show any files. I cannot alter it or delete it, so how can I recover this 434 GB.
I have run cc cleaner, disk defrag etc. but no joy.
Please, please ,anyone any ideas?