how is the sms guid generated?

i thought i'd post about this since i've not seen anything written on the subject (or maybe my google skills need honing). anyway, according to the clientidmanagerstartup.log, it evaluates these three things:

• smbios
• sid
• hwid

also, it looks like hwid is a computed value based on these five fields:

• win32_systemenclosure.serialnumber
• win32_systemenclosure.smbiosassettag
• win32_baseboard.serialnumber
• win32_bios.serialnumber
• win32_networkadapterconfiguration.macaddress

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