Try to uninstall it from the registry. 1. HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows > CurrentVersion > Uninstall 2. Search a string called UninstallsString corresponding to AVG 3. Open CMD and paste the string.
If you cannot find it, use Revo Uninstaller to remove AVG and its leftover files, folders and registry keys.
This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.
ref link: https://www.avg.com/en-us/avg-remover