Verdict: 8/10 for Performance Enthusiasts | 2/10 for Security-Purists What is Ghost Spectre OS? Ghost Spectre is a custom, pre-tweaked, and "debloated" version of Windows 10 and Windows 11 . Created by a developer known as "Ghost Spectre" on forums like TechPowerUp and YouTube, this ISO strips away everything the creator considers unnecessary: telemetry, ads, Edge (usually), OneDrive, Windows Defender (often disabled or removed), Xbox services, Cortana, and most background apps.