While cracked ZIP files hide viruses, legitimate installers sometimes flag as false positives. Disable AV just for the 10-minute install window.
for very old products, which may contain files not listed on the main site. Technical Specifications for PC download cubase 5 for pc zip
You can only legally obtain Cubase 5 by purchasing a used license with the original disc and USB eLicenser from eBay, Reverb, or KVR Marketplace. You then download the official (un-cracked) installer from the Steinberg legacy archive if you have a valid serial number. While cracked ZIP files hide viruses, legitimate installers