Locate that help the 2008 version run on Windows 10/11.
SCS Software (the developer) recommends moving to , which is actively supported, has multiplayer, tons of DLC, and is frequently on sale for ~$5. ETS1 is outdated (released 2008) and lacks modern features. Euro Truck Simulator 1 Activation Key
You can find used physical DVD copies of Euro Truck Simulator 1 on eBay, Amazon Marketplace, or local thrift stores. Locate that help the 2008 version run on Windows 10/11