[This is a repost as I think I posted in wrong section before]

Hey guys, new to this forum so hope this is the correct section / hope you deal with this stuff!

I have jailbroken my iphone 4, running 5.0.1, with redsn0w 0.9.10b5c. It has been running perfect for a month or 2, but as of recent has been getting more and more dodgy (Volume some times not working, messages and stuff dissapearing), and it has now got to the point where I can no longer charge without turning off my phone (presumably when redsn0w is no longer controlling my device), and my computer will no longer recognise my iphone, leaving me unable to sync / restore..

I have tried and have been unable to
-I am unable to enter DFU mode, the little apple sign comes up, but after following instructions over 5 times am unable to get into DFU mode on the phone meaning I cannot currently re-jailbreak
-Tried multiple computers I get 'unregnised USB device' when plugging in phone on all of them.
-Deleting most apps I have from cydia such as winterboard, syssettings.

Any insight in what to do would be greatly appreciated, and if I have come completely the wrong place a link to anywhere else would be great

Thanks for your time ~Tom

Didnt know if worth mentioning, but running WIN7, and have running redsn0w in admin mode