| Windows Defender Definition Updates | Microsoft Security Essentials Definition Updates x32 | BitDefender Virus Definitions | Avast Virus Definitions VPS | |
| January 21, 2025 | July 15, 2024 | December 20, 2024 | January 17, 2025 | |
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| Freeware | Freeware | Freeware | Freeware | Licence |
| FREE | FREE | FREE | FREE | Price |
| 168.00 MB | 141.00 MB | 280.00 MB | 190.00 MB | File size |
| Jan 21, 2025 | Jul 15, 2024 | Dec 20, 2024 | Jan 17, 2025 | Update |
| 17 | 40 | 11 | 34 | Downloads |
| Windows 11, Windows 10 32/64 bit, Windows 8 32/64 bit, Windows 7 32/64 bit, Windows Vista | Windows 11, Windows 10 32/64 bit, Windows 8 32/64 bit, Windows 7 32/64 bit, Windows Vista | Windows All | Windows All | OS |
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