Stop the malware from communicating with a server. Run a Full Scan: Use Microsoft Defender or Malwarebytes .
Click the (Mirror) link to skip the ad-heavy landing page.
Language telling you to "Download Now!" to fix lag or "Click Here" immediately is a common tactic. ✅ How to Safely Install Optifine Stop the malware from communicating with a server
Find the version matching your Minecraft installation.
Update passwords for your Minecraft/Microsoft account and email. safe Minecraft mod
Are you seeing any on your computer now (pop-ups, slow performance)?
If the download is an .exe instead of a .jar file, it is almost certainly a virus. Stop the malware from communicating with a server
Optifine is a legitimate, safe Minecraft mod, but it is only safe when downloaded from the official developer site.