Can't activate Windows 7- Fujitsu DT7-D2824

[Bioss]

Hello all.I am having trouble activating Windows 7.I have tried the activator by Daz 2.2.2 version but it didn't seem to work.It works on all others PC's,except this one.The PC is a Fujitsu DT7-D2824.It says 3 days until automatic activation.Please help.Thanks!