| Avast Free Antivirus | Avast Free Antivirus | Avast One | ZoneAlarm Free Antivirus + Firewall 2015 | |
| 25.2.9898a | 17.9.2322 | 25.2.9898a | 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 | 0.24 MB | 4.80 MB | File size |
| Mar 10, 2025 | Oct 4, 2017 | Mar 30, 2025 | Jan 24, 2017 | Update |
| 24 | 38 | 11 | 43 | 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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