Probably also I did something in Default Programs / Associate a file type or protocol with a program, but I don't remember.
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Hotmail.Url.mailto]
@="MailTo Protocol"
"URL Protocol"=""
[HKEY_CLASSES_ROOT\Hotmail.Url.mailto\DefaultIcon]
@=hex(2):25,00,50,00,72,00,6f,00,67,00,72,00,61,00,6d,00,66,00,69,00,6c,00,65,\
00,73,00,25,00,5c,00,49,00,6e,00,74,00,65,00,72,00,6e,00,65,00,74,00,20,00,\
45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,5c,00,68,00,6d,00,6d,00,61,\
00,70,00,69,00,2e,00,64,00,6c,00,6c,00,2c,00,30,00,00,00
[HKEY_CLASSES_ROOT\Hotmail.Url.mailto\shell]
[HKEY_CLASSES_ROOT\Hotmail.Url.mailto\shell\open]
"FriendlyAppName"="Windows Live Hotmail"
[HKEY_CLASSES_ROOT\Hotmail.Url.mailto\shell\open\command]
@=hex(2):43,00,3a,00,5c,00,55,00,73,00,65,00,72,00,73,00,5c,00,41,00,6e,00,64,\
00,72,00,65,00,77,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,\
4c,00,6f,00,63,00,61,00,6c,00,5c,00,47,00,6f,00,6f,00,67,00,6c,00,65,00,5c,\
00,43,00,68,00,72,00,6f,00,6d,00,65,00,5c,00,41,00,70,00,70,00,6c,00,69,00,\
63,00,61,00,74,00,69,00,6f,00,6e,00,5c,00,63,00,68,00,72,00,6f,00,6d,00,65,\
00,2e,00,65,00,78,00,65,00,20,00,68,00,74,00,74,00,70,00,3a,00,2f,00,2f,00,\
6d,00,61,00,69,00,6c,00,2e,00,6c,00,69,00,76,00,65,00,2e,00,63,00,6f,00,6d,\
00,2f,00,64,00,65,00,66,00,61,00,75,00,6c,00,74,00,2e,00,61,00,73,00,70,00,\
78,00,3f,00,72,00,72,00,75,00,3d,00,63,00,6f,00,6d,00,70,00,6f,00,73,00,65,\
00,26,00,74,00,6f,00,3d,00,25,00,31,00,00,00
