Sites like portableapps.com (which is reputable) do host Bluestacks. Any website offering a standalone .exe or .7z claiming to be "Bluestacks Portable No Install" is almost certainly malicious.
The portable version of Bluestacks offers several benefits: bluestacks portable no install
Bluestacks relies on (Intel VT-x or AMD-V). To access this, it installs: Sites like portableapps
After this deep analysis, here is the honest answer: it installs: After this deep analysis