If a computer previously hosted an unauthorized version of the software, cracking scripts often write lines into the hosts file to intentionally block SolidWorks from contacting official activation servers (such as ://solidworks.com ). When you attempt to install a legitimate license later, these hidden blocks remain and prevent activation. Common Symptoms
Leftover data from older software installations disrupts current license checks. Role of the Windows Hosts File solidworks host file block fix
The Hosts file is a powerful tool, but it is a scalpel, not a hammer. Used correctly, it silences validation noise. Used blindly, it breaks your internet resolution. Edit wisely. If a computer previously hosted an unauthorized version
The first step is to locate the file. It does not have a file extension. Open . Role of the Windows Hosts File The Hosts
Are you currently facing a specific (like -15,10,10061) when trying to connect to your SolidWorks license?
(Note: Ensure there is no # symbol in front of these specific lines, as hashes tell Windows to ignore the command).
Uncheck the attribute at the bottom of the General tab and click Apply . Step 3: Manually Edit the Hosts File for Server Connection