Scroll to the bottom of the document. Standard Windows hosts files typically end with explanatory text preceded by # symbols.
If your Installation Manager still shows a blank screen even after checking the hosts file, try this quick fix for blocked HTML files:
Scroll through the document to find lines containing validation keywords. Look specifically for entries containing: solidworks.com ://solidworks.com ://solidworks.com ://solidworks.com 127.0.0.1 ://solidworks.com 127.0.0.1 ://solidworks.com Use code with caution. Delete these lines entirely from the document. Step 4: Save and Flush DNS Click File > Save to apply the changes. Open the Command Prompt as an administrator.
: If the Installation Manager spends too much time attempting to verify a license against a non-responsive server, the process can take hours. Redirecting that hostname to a local loopback address ( 127.0.0.1 ) can force the installer to skip that check or move to the next step immediately.
Thank you for taking the time to thoroughly explore this technical topic. When choosing your path forward, please do so equipped with an understanding of both the technical methods and the important principles of responsible software use. solidworks host file block install
Bypassing server connection failures that halt the installation process. 2. Steps to Block SOLIDWORKS Domains in the Hosts File
: If the hosts file is manually set to "Read-only" in its file properties, the installer will be unable to update the necessary DNS mappings. File Mismanagement : If the file was accidentally renamed to
: If the installer still cannot connect to license servers, you may need to manually add the server's IP and name to the hosts file. as an Administrator. Open the file at C:\Windows\System32\drivers\etc\hosts Add a new line with the [IP Address] [Server Name] 192.168.1.100 MyPDMServer Save the file and run ipconfig /flushdns in a Command Prompt. SOLIDWORKS Forums Other Common "Blocks" Sometimes the installer appears "blocked" (e.g., a blank white screen
During installation and startup, SolidWorks communicates with official validation servers to verify licensing, check for prerequisites, and download installation files. If your Hosts file contains entries that redirect these official domains, the SolidWorks Installation Manager cannot establish a secure handshake. This triggers installation failures, serial number validation errors, or connectivity time-outs. Common Symptoms of a Hosts File Block Scroll to the bottom of the document
The most common error when editing the hosts file. : Notepad (or your text editor) was not launched with administrator privileges. Solution : Completely close your text editor, then right-click its icon and select "Run as administrator" before opening and editing the hosts file again.
Antivirus programs, including Windows Defender, are designed to protect your system and often flag the modified files and keygens used in "offline" or network-blocked setups as potential threats.
Ensure the lmgrd.exe and sw_d.exe ports are open (usually 25734 and 25735). 2. Perform a Clean Installation
Ensure that the SolidWorks Installation Manager ( sldim.exe ) is whitelisted in your Windows Defender Firewall rules. 2. Antivirus Aggressive Heuristics Look specifically for entries containing: solidworks
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For floating license setups (SolidNetWork License Manager), ensure your system can resolve its own machine name. Installing the Microsoft KM-TEST Loopback Adapter via the Device Manager provides a stable, internal network identity that bypasses complex external DNS roadblocks. Validating the Connection
In conclusion, editing the Hosts file to block SolidWorks is a powerful demonstration of the user’s technical control over their own machine—a local veto over a software vendor’s remote oversight. Yet, it is a fragile and illegitimate peace. The user gains a fortress of free functionality, but at the cost of legal safety, software integrity, and moral high ground. For learning, free alternatives like FreeCAD or Onshape offer a legitimate path, while for production, the licensing cost is ultimately the price of admission to a reliable, supported, and professional ecosystem. The blocked Hosts file is not a solution; it is a temporary, high-risk truce in the perennial war between software access and software value.
: If you cannot save the file, right-click the hosts file in File Explorer, select Properties , and ensure Read-only is unchecked.
SOLIDWORKS installation sometimes requires managing how the software communicates with license servers or activation servers, particularly in complex network environments, offline setups, or specific enterprise deployments. One powerful technique to control this communication is by editing the Windows to block specific domains.