Users who have installed the update have expressed frustration over noticeably slower download and upload speeds. One Reddit user described the L2TP/IPsec connection as crawling “to a snail’s pace” and becoming practically unusable. This type of VPN connection is widely used by businesses, making the speed issues particularly troublesome for customers.
KB5026372 Update breaks MS L2TP VPN Client
by u/lsausreddit in Windows11