Windows 7 hackers claim to have gone the extra mile and tested the cracked operating system on a wide number of computers from different original equipment manufacturers. According to description that accompanies pirated Windows 7 Ultimate ISO file, the copy of the operating system was tested on computers with hardware from 28 OEMs.
Not only this, the "OS doesn't require a crack in order to get it to work." This because the activation mechanism of Win7 has been cracked, and completely bypassed.
The pre-activated Win7 is designed for PCs from "Acer, Advent, Alienware, Asus, Benq, Compaq, Dell, Founder, Fujitsu, Gigabyte, Haier, Hasee, HCL, HP, Jooyon, Lenovo, LG, Medion, MSI, NEC, Nokia, Quanmax, Samsung, Sony, Tongfang, Toshiba, Trigem and Viliv."
OEMs don't need to go through the normal activation process of Win7 installation, as end users do. Instead they can leverage what the software giant refers to as OEM Activation 2.1, a mechanism which helps computer manufactures activate the copies of Win7 they pre-install on new machines.