[SCVirus]

Simple Sniff. Run a packet sniffer and find the key when connecting to bnet (it WAS not sure if it still is sent unencrypted) consult your EULA sniffing starcraft packets may be illegal.

Also if you simply take the starcraft folder along with a .reg of what it puts in the registry on a secure backup, then you shouldn't have to reinstall. Unless of cource you were reinstaling because of a problem. (again check the EULA making a copy of the program other then in memory may be illegal).