This is also a slightly newer build than the version published in December 2008. It's generally not a good idea to download software from anywhere other than the original source, but the original source here seems to be lost to time. If you see the Microsoft Defender SmartScreen, click on More Info, then click on Run. Next, double-click on the uupdownloadwindows.cmd file. Extract the zip file to locate the files inside. UUP Dump will download a zip file containing the ISO download package to your hard drive. I ended up using a mirror of Chrome 1.0.154 from the third-party software repository, OldVersion. To download the ISO file, click on Create download package. However, that's not quite the same thing as Google Chrome, and the early builds were crashing on my setup. Google has a hidden repository with every build of Chromium - the open-source version of Chrome with some features removed and different branding - and the Windows subdirectory goes all the way back to build 1625 from September 1, 2008. The original download page is still accessible on the Internet Archive, but the executable is a web installer that is no longer functional. Unfortunately, it doesn't seem like you can get it directly from Google anymore, or even from archived versions of Google's own site. The first step to running Chrome 1.0 is finding Chrome 1.0, which is easier said than done.