You cannot receive official updates, making the system vulnerable to new security threats.
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Here is a solid, critical review of such products based on community consensus, security principles, and performance testing of modified Windows ISOs: ⚠️ Critical Risks and Warnings You cannot receive official updates, making the system
Usually removes pre-installed apps, Metro UI (Start Screen), Cortana, Windows Defender, Windows Update, printer drivers, and sometimes network components to save RAM and disk space. You cannot receive official updates