Programming :: Make A New Folder For Each File In A Particular Folder

I been using linux for a while, but I havent had the time to really learn it. Something Id like to get more familiar with is bash so here is a simple example of something I would like to do:

I have a directory full of files. For each file in the directory create a new subdirectory with each files name.

I tried this:

#im already in this directory
aaa=./*
for a in $aaa
do mkdir $a
done

One of the problems is that there are spaces () and - in the filenames so I get many subfolders with names like "-" which i don't want.

I tried stuff like:
aaa=./*
for a in $aaa
do mkdir "'"$a"'"
done

This of course also did not work.

Additional I tried just creating a folder with the name of one of the files and I got this:

mkdir: cannot create directory `(audio) - R56339.EXE': File exists
Well yeah a file exsists with that name, but I want to create a folder- why is there a conflict?

Just to be clear here are the contents of this folder:
~/Desktop/LAB/Media/Drivers - (Image Deployment)/Optiplex_GX260/XP> ls
(audio) - R56339.EXE (NIC-Onboard-Intel) - R54402.EXE
(Modem-datafax-V92) - R54403.EXE OEM_Applications

[Code].....