Attempt to launch SL. Watch the viewer immediately crash. This does not persist in the current beta viewers, but it does seem to be related to some recent (possibly insider) Windows updates and should be considered a high priority. The information pasted into
Platform
is from one of these beta viewers. Event Viewer shows the following errors. (Edit: The beta only seems to run if launched from the installer. If you attempt to relaunch the viewer, it obfuscates the event viewer logs and only reports an upload to bugsplat. Based on a crash from Firestorm at the same point, it's likely related to MSCTF.dll.)
Faulting application name: SLPlugin.exe, version: 0.0.0.0, time stamp: 0x659dc0e6
Faulting module name: libcef.dll_unloaded, version: 118.4.1.0, time stamp: 0x651cb3d9
Exception code: 0xc0000005
Fault offset: 0x00000000046433f0