Here's how you can jailbreak iPhone 4S, iPad 2 untethered 5.0.1 firmware on Windows. We will be using the advanced CLI tool that has been released for both Windows and Mac computers. Absinthe GUI is only available for Mac right now.
Earlier today the Chronic Dev Team released Absinthe jailbreak tool. This new and surprisingly easy jailbreak tool lets you jailbreak iPhone 4S, iPad 2 untethered by just clicking one button. For more advanced users, the iPhone Dev Team released CLI tool. It is command line based and is likely to freak out most new jailbreakers. Since Absinthe for Windows has not been released it, we can only use CLI tool to jailbreak iPhone 4S, iPad 2 untethered on Windows.
The iPhone 4S can be jailbroken untethered on both iOS 5.0 and iOS 5.0.1 firmware whereas the iPad 2 can only be jailbroken untethered on iOS 5.0.1. Make sure that you have properly updated your devices and have created a backup in iTunes before proceeding with this. Remove passcode lock from your device as well.
Once again, CLI tool is meant for advanced users. There's a chance that you will mess things up if you're not exactly sure of what you're doing. We will teach you the whole process in the simplest way possible, but its up to you if you want to jailbreak iPhone 4S, iPad 2 untethered on Windows right now or wait until Absinthe for Windows is released.
How To Jailbreak iPhone 4S, iPad 2 Untethered 5.0.1 On Windows Using CLI:
Step 1: Download CLI 0.4.3 for Windows and unzip the package in root directory, where Windows is installed, such as C:
Step 2: Go to Start menu and click on Run
Step 3: Type CMD.exe
Step 4: Type without quotes: "CD C:\cinject_0.4.3" and press enter
Step 5: Execute command: "cinject.exe -i payloads/jailbreak.mobileconfig" [Execute command means write in CMD.exe what's written inside quotes, without quote signs]
Step 6: Approve Install request on your device. Next > Next > Finish, no need to enter password
Step 7: Execute command: "cinject.exe -j payloads" Wait for backup
Step 8: Execute command: "cinject.exe -w"
Step 9: You will need to turn on VPN from Settings.app after the lines flashing on CMD.exe stop. The activity will begin again and you will see that Cydia has appeared on Home screen
That is all you need to do to jailbreak iPhone 4S, iPad 2 untethered on iOS 5.0.1 using CLI on Windows. If you face any issues or can't understand any part of the procedure, leave a comment down below and we will help you out.
Update 1: Facing FATAL(_LINE_): Assertion failed (1266): got == sizeof(size)
1226 error? Launch Settings.app on your device. Go to General > Reset > Erase All Content And Settings. Then do the procedure all over again.