| Avast Free Antivirus | Avast Free Antivirus | Avast One | ZoneAlarm Free Antivirus + Firewall 2015 | |
| 25.1.9816 | 17.9.2322 | 2024 24.12.6142a | 15.0.159.17147 | |
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| Adware | Freeware | Demo | Trialware | Licence |
| FREE | FREE | FREE | $39.95 | Price |
| 0.24 MB | 6.84 MB | 9.40 MB | 4.80 MB | File size |
| Feb 20, 2025 | Oct 4, 2017 | Dec 19, 2024 | Jan 24, 2017 | Update |
| 18 | 36 | 9 | 40 | Downloads |
| Windows 11, Windows 10 32/64 bit, Windows 8 32/64 bit, Windows 7 32/64 bit | Win2000, Windows XP, Windows 7 x32, Windows 7 x64, Windows 8, Windows 10, WinServer, WinOther, Windows Vista, Windows Vista x64 | Windows 11, Windows 10 32/64 bit, Windows 8 32/64 bit, Windows 7 32/64 bit | Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64 | OS |
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