SketchUp 2017 Make is no longer officially available for download from Trimble (the current owner). Trimble removed it from their website in late 2020, encouraging users to move to SketchUp Free (web-based) or paid SketchUp Pro.
Windows Defender SmartScreen may flag the file as “uncommon.” This is because the file is older. Right-click the downloaded .exe, select Properties, and check “Unblock” at the bottom. Then run the installer. download sketchup 2017 make verified
Here is the hard truth: Trimble has officially retired SketchUp 2017 Make. You cannot find it on the official sketchup.com download page anymore. The official knowledge base states: SketchUp 2017 Make is no longer officially available
"SketchUp Make 2017 (the final version of Make) is no longer available for download from Trimble. Existing license holders may continue to use it, but we do not provide support or installation files." "SketchUp Make 2017 (the final version of Make)
So, how do you get a verified copy? You rely on the official archive maintained by the community and verified hash checks.
The only safe source today is the Internet Archive's "Wayback Machine" capture of the official Trimble download server, or the community-maintained "SketchUp Make 2017 – Last Free Version" thread on the official SketchUp Community Forum.