Wifi problem of G560 after upgrading to windows 8.1

Hi,
I have a lenovo G560. After upgrading from windows 8 to windows 8.1, I cannot connect to wifi. I was wondering if someon else has the same problem.

hi amardoukhi,
Welcome to the Forums.
Your issue might be similar to this thread. Try the solution that was posted to rollback to an older driver version.
The solution was to:
1. Open Device Manager (press WInkey+R > type devmgmt.msc)
2. On the Device Manager, navigate to Network Adapters > right click on the wireless adapter and choose Update Driver Software
   - Link to picture
3. On the Driver Update Window, choose Browse my computer for driver software >  Let me pick from a list of device drivers on my computer and choose the wireless card on the list.
   - Link to picture
   - Link to picture
   - Link to picture
Regards
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