In case you're still supporting .NET 1.1 applications, you should be aware that on October 14, 2008, mainstream support comes to this end and moves into extended support. Extended support continues until October 8, 2013.
What is the difference between Mainstream Support, Extended Support, and online self-help support?
|Support provided||Mainstream Support phase||Extended Support phase|
|Paid support (per-incident, per hour, and others)||X||X|
|Security update support||X||X|
|Non-security hotfix support||X||++|
|No-charge incident support||X||++|
|Design changes and feature requests||X||++|
|Product-specific information that is available by using the online Microsoft Knowledge Base||X||X|
Product-specific information that is available by using the Support site at Microsoft Help and Support to find answers to technical questions
X = Included
++ = Requires extended hotfix agreement, purchased within 90 days of mainstream support ending
Note A hotfix is a modification to the commercially available Microsoft product software code to address specific critical problems.