Windows updated to 8.1,some antivirus systems not working

AVG Protection
1

Windows automatically updated from * to 8.1, some of the antivirus systems are not working

2

Rosemary, You should only have 1 - AV installed on your system. AVG AV should be OK on Win 8.1.
AVG Guru

3

Rosemary, You should only have 1 - AV installed on your system. AVG AV should be OK on Win 8.1.
AVG Guru