What is Akamai Netsession Client, netsession_win.exe?

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My firewall suddenly has asked me to let through “Akamai Netsession Client”, specifically netsession_win.exe. I’ve never heard of this before, and my general rule of thumb is if there’s nothing new going on or nothing has changed, I block it. Anyone have any idea what this is and if I need to let it through my firewall?

I should point out that around the same time, some wow64 file (can’t remember now exactly what it was called), and INSTALLER_UPLOADER.EXE ( from the same Akamai directory as the netsession file: C:\USERS\MYNAME\APPDATA\LOCAL\AKAMAI\INSTALLER_UPLOADER.EXE ).

This one looks awfully fishy, so I blocked it.

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