You cannot run or install an update directly from a .7z file; you must extract it first. Download a compatible extraction tool like 7-Zip or WinRAR .
Insert the card into the printer while it is off, then turn it on to trigger the update. Update v3.7.7z
Look for an .exe or .msi file. Run this as an administrator to start the installation wizard. For 3D Printers (Creality/Ender): You cannot run or install an update directly from a