@mattporter
There is an uninstaller that comes with Hotspot Shield inside the .dmg file.
@Mark401
Yes I do agree that Hotspot Shield seems kind of shady, so I suggest everyone uninstall that once you are done downloading OS X Mavericks. I install and uninstall Hotspot Shield quite frequently, for when I need to change my IP to access blocked sites or for situations like this.
@William Allbrook
Yeah I think the problem is with our ISP. The fact that it was stuck at the same mark everytime suggets something wrong with the ISP's cache. If you tried grabbing the download directly you'd see that the file is 996MB instead of the full 5.31GB, so from our ISP's point of view, the file is 996MB which explains why we get stuck at that everytime. Also I'm not from the UK but the majority of people facing this seems to be from the UK and is using BT as their ISP. I think all of you should contact them and let them know about this.