Safemodes

Word 2002 / 2003

http://support.microsoft.com/kb/827706

Excel 2000 / 2002 / 2003
http://support.microsoft.com/kb/280504

Office 2007
http://office.microsoft.com/en-us/outlook/HP101407921033.aspx

Firefox
Thunderbird
http://kb.mozillazine.org/Safe_Mode_%28Firefox%29

Windows XP
http://support.microsoft.com/kb/315222

Windows Vista
http://windowshelp.microsoft.com/Windows/en-US/help/323ef48f-7b93-4079-a48a-5c58eec904a11033.mspx

Seamonkey
http://kb.mozillazine.org/Talk:Safe_Mode#Safe_Mode_in_SeaMonkey_2

Sunbird
http://www.mozilla.org/projects/calendar/releases/sunbird0.8.html#troubleshooting