It is possible, via local policy, to require administrative rights to install the printer drivers. If ADDPRINTERCONNECTION cannot install the printer drivers then it'll fail. The solution would be to log in as administrator once and install the printer drivers.
Put
code:
? @ERROR + ' - ' + @SERROR

right behind the ADDPRINTERCONNECTION line and tell us what error code you get.

With regards to SETTIME, you should rather use W32TIME service which is a client-server time service for Windows NT/2000/XP that is part of the OS.
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