hiding folders or files is easy.
Why they are hidden if you didn't hide them involves providing us with additional information such as this happening after removing some malware or someone else using the computer or something else you haven't mentioned.
Are you wanting help with hiding more directories or with unhiding what you have - you just are not clear on this.
ASSumeing you want them unhidden and that they were first noticed after cleaning up some malware you might get something out of this (you NEED to read through the thread):
On the other hand if you want everything hidden open a command prompt and type the following commands:
ATTRIB +H /s/d
WARNING!!!! using that specific set of commands may make Windows refuse to boot but it will hide all the files and directories as well as all sub directories on the C: drive (in the commands above change the +H to a -H to unhide all the files and folders on that C: drive)
Folders are not showing up in a particular folder. I can type in the folder name in the address bar and get to it. Not all folders are doing this, only a couple of them. Can anyone provide some help on this issue?