As of my latest knowledge cutoff, this specific build string does not correspond to a publicly released Windows Insider Build (Canary/Dev) or a general cumulative update for Windows 11 version 24H2/23H2. Build numbers in the 262xx range typically belong to the Canary Channel , but 26220 has not been announced. The .7070 revision suggests a non-public or internal Update Stack Package or a very specific servicing pipeline test.