Questions before factory reset (because IOS 6.1 update problems iPhone 5

Hi All,

Last week i have updated my Iphone 5 to IOS 6.1

Now i do have some problems,

No recognize Iphone on Imac and Windows & laptop.

No USB charging anymore

No Itunes sync.

etc. etc.

I've done several resets but no solutions.

No i'm thinking to reset my Iphone 5 to factory default.

If i reset to factory, will my Imac recognize the Iphone 5 again???

if there is no recognize, how do i setup the Iphone 5 again?

I am a bit afraid that there won't be a recognize after reset, because there is no recognize at this moment!

I hope there is someone overhere that can answere my questions?

thanks anyway

greetings Rene