I finally fixed it! Don't know really how but here goes what I did.
You all agreed that before IOS7, by simply plug usb cable between PC and iphone that was it?!
Updated to IOS7, liked it a little, noticed slowness, but was fairly acceptable. My problem started when I was not able to sync my outlook calendar, contacts, etc. to my phone then I freaked out, because kept having this "do you trust this computer again and again when I clicked Trust.... got me crazy.
Someone told me to use iCloud. Did, but I can check my Iphone contacts on a website! not what I was looking for. Then I downloaded ICloud for windows, so I can sync (another procedure) to my outlook. Ran it, restarted, found that my wlan card was disabled, fixed it, restarted (anxious), when back, checked some changes made in outlook, more folders and buttons, but it seemed to work.
I plugged the usb cable and iphone to my pc and Viola! they synchonized!! via usb cable!!
was it the cable? the icloud installation? the rebooting? don't really know, but it works now...
I was this close to return to IOS6 by doing all those creepy steps, but it is ok now...
Please let know if it work for you guys!!
cheers!
Manny