Microsoft Knowledge Base

Microsoft Knowledge Base (MSKB) was a website repository of over 150,000 articles made available to the public by Microsoft Corporation for technical support.{{cite web |url=http://support.microsoft.com/kb/242450 |title=How to query the Microsoft Knowledge Base by using keywords and query words |access-date=2019-07-08}} It contained information on many problems encountered by users of Microsoft products. Each article bore an ID number and articles were often referred to by their Knowledge Base (KB) ID.{{cite news|last=Muchmore|first=Micheal|title=Use Microsoft Knowledge Base. The next place to go for help is the immense Microsoft Knowledge Base.|url=https://www.pcmag.com/article2/0,2817,989479,00.asp|newspaper=PC Magazine|date=22 April 2003}} Microsoft Windows update names typically start with the letters "KB", in reference to the specific article on that issue. Previously, the letter "Q" was used.

As of 2020, Microsoft began to discontinue the Knowledge Base service. Some content was migrated to the learn.microsoft.com sub-site.{{citation needed|date=March 2023}}

kbalertz.com was a website that provided email alerts of new articles,{{cite web

|url=http://kbalertz.com/

|title=KBAlertz.com: Knowledge Base Alerts

|archive-url=https://web.archive.org/web/20130105111128/http://kbalertz.com/

|archive-date=2013-01-05

|url-status=dead

|access-date=2018-02-05

}} although Microsoft had also provided a similar service.{{Citation needed|date=February 2018}}