Для восстановления ассоциаций для линков https скопируйте в блокнот и сохраните с расширением reg -
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\https]
@="URL:HyperText Transfer Protocol with Privacy"
"EditFlags"=dword:00000002
"Source Filter"="{E436EBB6-524F-11CE-9F53-0020AF0BA770}"
"FriendlyTypeName"="@C:\\windows\\system32\\ieframe.dll.mui,-904"
"URL Protocol"=""
[HKEY_CLASSES_ROOT\https\DefaultIcon]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,75,00,72,00,\
6c,00,2e,00,64,00,6c,00,6c,00,2c,00,30,00,00,00
[HKEY_CLASSES_ROOT\https\shell]
@="open"
[HKEY_CLASSES_ROOT\https\shell\open]
[HKEY_CLASSES_ROOT\https\shell\open\command]
@="\"C:\\Program Files\\Internet Explorer\\IEXPLORE.EXE\" -nohome"
[HKEY_CLASSES_ROOT\https\shell\open\ddeexec]
@="\"%1\",,-1,0,,,,"
"NoActivateHandler"=""
[HKEY_CLASSES_ROOT\https\shell\open\ddeexec\Application]
@="IExplore"
[HKEY_CLASSES_ROOT\https\shell\open\ddeexec\Topic]
@="WWW_OpenURL"
