It is strongly recommended that you perform all updates from the AVG Free interface. The program can distinguish between full and differential updates; while this page offers only full update files for download.
1. Windows: 8.0.237 [Download]
2. Link Scanner DB: 8.0.103 [Download]
3. AVI: 270.11.25 [Download]
4. IAVI: / 2019 [Download]
Source: http://free.avg.com/download-update