The Update Change Log says: Fixes an “Installation Repair” issue - [Link]....
For me the recent NIS 21.7.0.11 Update NOT solved the Installation Repair Issue (Norton Autofix)
Norton autofix results
Issues found 1
Issues fixed 1
This down is my Report (Italian):
Norton Internet Security
21.7.0.11
Windows 7 Home Premium
7601.18741.amd64fre.win7sp1_gdr.150202-1526
Risultati di Norton Autofix: 1 elemento/i
Installazione :: Riuscito