Start up problem
@Anonymous
Welcome to the community....
The "install now" option is an unreliable method of installing Autodesk products and shouldn't be used at all. 
So lets first, perform a clean uninstall per these instructions. Just make sure to adjust settings if you have other Autodesk products already installed/working on your machine. Then, download and install per:
1. Access the Autodesk Virtual Agent and follow the download links to your product.
2. Download all of the parts (some applications only have a single part to download) for your product first. Do not continue until all of the parts have fully downloaded.
3. Navigate to your download folder location and extract (double click) part _001_00X.sfx.exe (or the single file download).
4. In a few seconds the extraction will start and prompt you to extract to C:\Autodesk.
5. Once the extraction is finished, the installation will automatically start.
6. Follow the installation steps for your product
If you want the full recommended installation steps, click on the installation link in my signature.
However if the installation does fail using this method, please post your installation log file here so we can review it. Posting info: Sometimes installation log files contain personal information such as your serial #. Prior to posting your log file please make sure to remove such info.
Good luck on your installation and report back on your progress.
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Hello @Anonymous,
I wanted to check-in with you, I hope you were able to resolve the issue by using the Virtual Agent.
If so, please select a response that resolved the issue and click "Accept As Solution" button to help others in the community.
Thank you.
Natasha
Community Product Support Specialist
Helpful Links:
AutoCAD Videos | AutoCAD Crashes or Freezes | AutoCAD Customer Council | AutoCAD System Requirements | Prepare your computer for download | Autodesk Virtual Agent | Clean Uninstall | Steps for Setting-Up Student Software