| Avast Free Antivirus | Avast Free Antivirus | avast! Pro Antivirus | Avast One | |
| 25.4.6158a | 17.9.2322 | 20.5.5410 | 25.3.9983 | |
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| Adware | Freeware | Trialware | Demo | Licence |
| FREE | FREE | $69.95 | FREE | Price |
| 628.00 MB | 6.84 MB | 0.21 MB | 9.20 MB | File size |
| May 5, 2025 | Oct 4, 2017 | Jul 10, 2020 | Apr 2, 2025 | Update |
| 32 | 41 | 39 | 12 | 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 7, Windows 7 x64, Windows 8, Windows 8 x64, Windows 10, Windows 10 x64 | Windows 11, Windows 10 32/64 bit, Windows 8 32/64 bit, Windows 7 32/64 bit | OS |
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