For a more stable and safer system, shoot MS-IE, MS-Outlook and MS-Office out, and replace them with SeaMonkey (e-mail client included) and Open Office.
Log-Protect	Protect your children against the Net
Parental Control	Parental control (french)
Crapthèque	List of "Crapuleux" software (french)
Skype	Call other SkyPE users for free all around the world
Mozilla
Mozilla Suite	The best Internet browser and e-mail suite
SeaMonkey	Mozilla Suite becomes SeaMonkey
FireFox	Internet browser only
Thunderbird	e-Mail Client
Open Office	Choose "Non-Micro$oft" solutions
Version 3.2.1 in french	(129 Mo)
Version 3.2.1 in english	(134 Mo)
Documentation
Lot of Freeware
Google Earth	Take a look at the earth from the sky
Zebulon	French "bidouilleurs"
FramaSoft	The free software library (Wonderful but in french)
VLC (VideoLAN Client)	Video player and streamer.
aMSN Messenger	The one you need to replace Micro$oft version
Miranda	Another MS-Messenger replacement
InkScape	The "Adobe Illustrator" like
Scribus	Publishing as with Adobe InDesign
Kompozer	Web authoring
NVU	The father of Kompozer
LINUX distributions :
DistroWatch.com	Discover different distributions of Linux
icewalkers.com	Discover different distributions of Linux
Knoppix	Knoppix
Knoppix	Knoppix
Ubuntu	Ubuntu
K-Ubuntu	Ubuntu : KDE Desktop
DSL	Damn Small Linux
KOffice	LiveCD version of this KDE office suite
Puppy Linux	Small linux liveCD distro. A wonderfull tool.
Interesting web sites :
	Free Softwares Users Group Arlon