Silver V4.2.1 Windows 10 [portable] Download -
While this version was widely used for devices like the iPad 2, it is important to note that . What is Silver (Sliver) v4.2.1?
It offered a tethered bypass, meaning if the device completely lost power, the bypass might need to be reapplied unless specific jailbreak steps were taken. Why Version 4.2.1 is Deprecated
Built specifically for Windows 10 ; it is generally incompatible with Windows 7 or Windows 8.
To perform the bypass on A5 devices like the iPad 2, you typically need an Arduino Uno paired with a USB Host Shield to enter "pwned DFU" mode.

