I have an Alienware 15 and I have been trying to unsuccessfully install SupportAssist for the last few hours. I have tried using aulauncher.exe, the SupportAssistInstaller.exe, and SupportAssistLauncher.exe. 

The SALauncher and SAInstaller give me the same error message: 
Whereas if I run the aulauncher.exe I get an install complete after it downloads one file called CSAW.exe.

I cannot find this file anywhere and if I search for SupportAssist it doesn't show up on my control panel. However, if I search for SupportAssist in my windows search "Dell SupportAssist" shows up with a link to this file: 
Which, when I click yes, does nothing.

Out of desperation, I tried to download the .msi for SupportAssist from http://downloads.dell.com/serviceability/catalog/ and trying any of the versions always gives me the same error: 

I do not have any SupportAssist, PCdir or PC Doctor folders under Program Files or Program Files/Dell as I deleted all of them trying to follow another solution somewhere else on this website.

As to some quick background as to why this is so important: I uninstalled SupportAssist a while ago to make space on my C drive and get rid of the somewhat annoying prompts. Since then I updated a lot of my drivers to newer versions than what is recommended by Dell via 3rd party software and now want to revert a lot of my drivers as my computer has been experiencing some issues.

Sorry for the long post. Trying to give as much information as possible. Any help would be much appreciated! Thank you in advance.