I recommend openSuse http://www.opensuse.org/
There are bunch on there. Here is another for non-dual layer:
I do not recommend to download an iso image of an operating system from other site than officials.
Many other things can be added in order to modify the operating system security.
Absolutely agree with Mariodlg. Be careful.
hi ,thxs actually i lke to work in Vmware software….i m using windows as my operating system.hence no problem…..