Some entry-level iMice models are "plug-and-play" only. If no specific driver exists, use X-Mouse Button Control to remap the buttons manually.
Sites like DriverGuide.com or StationDrivers.com sometimes host legacy files. If you use these, always scan the .exe or .zip file with Windows Defender or Malwarebytes before opening. Imice Mouse Software Download
Search for "Imice Gaming Mouse Driver" on these sites, but always scan the downloaded .exe file with Windows Defender or Malwarebytes before running. Some entry-level iMice models are "plug-and-play" only
Imice products are often sold under various brand names or through specific distributors. Check the packaging or the Amazon product page for a specific URL. Imice Mouse Software Download