"When you try to activate Vista or Windows 7 on a OEM PC or notebook, the activation process can fail due to issues related to ACPI_SLIC table some OEMs use in their computer's BIOS. "This problem occurs if KMS server doesn't find a valid Windows marker in ACPI_SLIC table in computer's BIOS program. Or You purchased a computer that has qualifying Windows. However, Windows marker in ACPI_SLIC table is corrupted. Or You purchased a computer that doesn't have qualifying Windows. In this case, Windows marker isn't present in ACPI_SLIC table"," informs Microsoft in KB942962.
Microsoft pointed that Lenovo machines with following BIOS: X60 - BIOS : 2.00 (7BETB3BL) 2006-08-07 and T60 - BIOS : 2.00 (79ETB3BL) can produce failed installations when customers attempt to activate either Win7 or Vista via KMS server.
You receive any of following error messages: