Memory integrity error upon boot.
boot of what: the editor in the project picker, the editor for your project, a stand alone packaged game, a server instance, your operating system?
if this is with regards to the Editor for your project can you show the most recent log file for this error [ProjectName]/Saved/Logs/[PorjectName].log (this is a raw text file, so you can open it in most any text editor), these are written in real time while the Editor is open.
does this happen only on your project, does this happen in a blank project?
if this is for the Editor project Picker the it will be “%AppData%" (this will default to Roaming so go up 1 directory level) → Local/UnrealEngine/[VersionNumber]/Saved/Logs/
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are you experiencing any other unusual behavior in other applications, or just on the desktop: applications doing random abnormal things, crashes (Blue Screen, Black Screen, or full reboot), freezes, closing?
what is your CPU, Motherboard, RAM, GPU?
how old is your system?
are you on Windows11 upgraded from Windows10?
are you overclocking? (XMP does count)