| Avast Free Antivirus | Avast Free Antivirus | avast! Pro Antivirus | avast! 5 Pro Antivirus | |
| 25.1.9816 | 17.9.2322 | 20.5.5410 | 6.0.1000 | |
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| Adware | Freeware | Trialware | Trialware | Licence |
| FREE | FREE | $69.95 | $39.95 | Price |
| 0.24 MB | 6.84 MB | 0.21 MB | 38.29 MB | File size |
| Feb 20, 2025 | Oct 4, 2017 | Jul 10, 2020 | Feb 25, 2011 | Update |
| 17 | 35 | 38 | 34 | 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 2000, Windows 2003, Windows XP, Windows Vista, Windows Vista x64, Windows 7 | OS |
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