Yes, if the error is caused by a DNS issue preventing your client from finding the license server. You can use the Hosts file to map the license server's name to its correct IP address as a temporary fix.
Outdated root certificates in older Windows builds can prevent your system from establishing secure handshakes with modern SolidWorks authentication servers.
C:\Windows\System32\drivers\etc\hosts
The hosts file is a system file that maps hostnames to IP addresses. It is used by the operating system to resolve hostnames to IP addresses, allowing users to access websites and other network resources. However, the hosts file can also be used to block access to specific websites or servers, including those used by software installation processes. solidworks host file block install
: Open File Explorer and go to: C:\Windows\System32\drivers\etc\
Depending on your goal, you would add different types of entries. Here are the most common ones:
SolidWorks installation errors often trace back to a modified Windows hosts file. System administrators or security software frequently block specific domains to manage network traffic or software validation. When these blocks intersect with SolidWorks activation servers, the installer fails. Yes, if the error is caused by a
Using the Hosts file is a straightforward technique, but there are important guidelines to follow.
Blocking SolidWorks installations or license activation via the hosts file is a method some administrators use to prevent unauthorized activation or to stop SolidWorks from contacting specific network license servers or online activation servers. Below is a concise, practical overview covering what it is, why and when it’s used, how it’s done, the risks and limitations, and safer alternatives.
You cannot edit the hosts file without administrative rights. Click and type Notepad . Right-click Notepad and select Run as administrator . 2. Locate the Hosts File In Notepad, go to File > Open . Navigate to: C:\Windows\System32\drivers\etc fails to validate your serial number
If your installation freezes, fails to validate your serial number, or cannot connect to the Activation Wizard, your system's network configuration is likely blocking communication with Dassault Systèmes servers.
Click > Save (or press Ctrl + S ). If Windows asks you to save it as a new text document, Notepad was not launched with true administrator permissions. Close Notepad.
Ensure that the SolidWorks Installation Manager ( sldim.exe ) is whitelisted in your Windows Defender Firewall rules. 2. Antivirus Aggressive Heuristics
Some SolidWorks network licenses rely on a "Heartbeat." If the software cannot ping the activation server every 30 to 90 days, it assumes the license is stolen and disables itself. Adding a block stops this remote kill-switch.