Try the VLC PORTABLE VERSION which is a zero install method.
I can't comment on your machine's install issues as there is no error messages and since VLC is just a player I don't see why the security of any browser is being changed.
Link? -> http://download.cnet.com/VLC-Portable/3000-13632_4-10871918.html
Use the Direct Download Link to avoid any security issue.
I am new here and this is the First time Ive posted anything. But this is driving me nuts!!! I have tried everything to get the vlc media player to install on my laptop which has windows 7. Ive done the troubleshooting with changing my security on my browser, tried downloading it from different sites, all to no avail. Im about to post a question on yahoo answers and see where that gets me. But first I thought I'd share it here. Can anyone give me any suggestions, troubleshooting tips that I may have overlooked? Thanks!