Folders Becoming Hidden?

[ICT_GUY]

I was just checking a location of a file on one of my drives on my main PC when I noticed that all the sub folders were missing. After a bit of poking around I have found that they are all hidden. Any ideas why? This has happened on all of my lopcal drives internal and external. Vista 64 btw

[Psymon]

Seen this happen when using xcopy to back up. Marks some of the files as system directories wrongly and decides to hide them.

 

Simon