#INSTALL SINGLE APPLICATION MODE TO ANDROID 4.0.3 TABLET DRIVERS#
Get the drivers for 32-bit Windows here or for 64-bit Windows here.
So, back up your phone data before you flash the new firmware.
Read the rest of this guide for the instructions. But, if you want to try it, you can manually flash it to your phone using the leaked firmware and Odin3. Since Samsung has not yet pushed out this official firmware for the Galaxy S2, you can’t update your phone with it through Samsung KIES. By the looks of it, firmware build XXLP6 looks like it’s worth trying.