Intra in:
START > RUN > in run scrii > Gpedit.msc.
Dupa iti apare o fereastra si selectezi > USER CONFIGURATION > ADMINISTRATIVE TEMPLATES > SYSTEM > CTRL+ALT+DELETE Option > Remove Task Manager > Si selectezi DISABLE. Dupa dai APPLY si OK.
Intri iar in RUN > scrii > gpupdate /force > Iti apare o fereasta si dispare.
Gata.Acum ar trebui sa mearga.