Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Go here:
https://www.reddit.com/r/jailbreak/...ial_how_to_downgrade_your_iphone_4sipad_2_on/

I was able to downgrade my 4S this morning on my work PC because I had been trying for two days on my home PC to no avail.

IMG_0001.PNG
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.