The Windows Defender antivirus and the Windows Firewall should be disabled, NOT removed (so you can turn them back on). If the builder removed SecurityCenter completely, skip it.

Warning: The internet is flooded with malicious ISOs. When searching for "Windows 10 Pro download top highly compressed best," you will encounter dangerous pitfalls.

Once you have downloaded the top highly compressed best file (usually in .7z, .rar, or .esd format), follow these steps:

The real optimization happens after installation. Here’s how to get a lean, fast Windows 10 Pro system (best for low-storage or older PCs):

A: Yes, often. Windows Defender may flag the custom unattended.xml script or the compression tool as "HackTool." This is a false positive because repackers automate installation. However, always scan with a second opinion like Malwarebytes.

| Feature | Fake “Highly Compressed” ISO | Official + Post-Install Compact | |--------|-------------------------------|----------------------------------| | File size | 300MB – 1GB (suspicious) | 4.5GB ISO → 3GB after Compact OS | | Security | High risk of malware | 100% secure, receives updates | | Stability | Crashes, missing drivers | Perfect | | Activation | Cracked (illegal) | Requires genuine license |