I asked you to let me know if you were able to download the installer file since the links could expire.
The site you see hosts the installer files for AutoCAD 2015 LT version, so I provided their download links since the official AutoCAD web site removed the download links for AutoCAD 2015 LT and promotes the newest version - 2016.
I am sorry if the download links have expired. You should have notified me earlier and I would have sent you a new link.
If you still need them, please click onTHIS LINK
and then scroll down to the "AutoCAD LT 2015 Free Download" section where you will see two blue download buttons - one for 32-bit version and the other for 64-bit version.
Click on the desired version and wait until the file starts to download. Just don't click on any ads that may appear at the top of the screen.
Those are the official AutoCAD 2015 LT installer files that were removed from the AutoCAD web site.
When installed, you get a free 30-day trial period, but you can type your serial number to fully activate the product on another computer.
I hope this helps!
Let me know if you require further assistance.