I've found it!
Call stack of thread 000007B0
Address Stack Procedure / arguments Called from Frame
014DFF14 7C821364 Includes ntdll.KiFastSystemCallRet ntdll.7C821362 014DFF7C
014DFF18 77E42439 ntdll.ZwDelayExecution kernel32.77E42433 014DFF7C
014DFF1C 00000000 Arg1 = 00000000
014DFF20 014DFF54 Arg2 = 014DFF54
014DFF80 77E424B7 ? kernel32.SleepEx kernel32.77E424B2 014DFF7C
014DFF84 0000EA60 Timeout = 60000. ms
014DFF88 00000000 Alertable = FALSE
014DFF90 776B22A0 ? kernel32.Sleep ole32.776B229A 014DFF8C
014DFF94 0000EA60 Timeout = 60000. ms
It seems that a thread is created which sleeps for a minute(or is it two? dunno lol :S).
This [thread 000007B0] isn't the main thread. Anyone has an idea why this happens?