EDIT Sorry for posting in the wrong section, I did not know. Besides, my problem is already solved by ONLY selecting the "Ignore the existing SLIC". It did not work before so I have no idea why it worked now but all is well. EDIT/ Hello all, Today I Installed Windows 7 32bit MSDN version on a Dell Optiplex 755. I tried to activate it with Windows 7 loader Daz but after rebooting I just got a black screen (NO BSOD) I did the bootsect.exe /nt60 ALL /force and could startup windows normally but it was still not activated. I tried: Legacy mode Disable type 4 Disable type 3 Ignore the existing SLIC Legacy mode + Ignore the existing SLIC Disable type 4 + Ignore the existing SLIC But it all gave me the same result, black screen, NO windows screen at all. I tried the Preserve the boot code but then even the bootsect.exe dit not help to boot windows and I had to reinstall Windows 7. The Dell Optiplex 755 has the latest bios version. Can someone help me with this?