Really sounds like you need to update your wireless driver but post the logs requested below in your next reply so I can see if there are any other issues.
Please download
FarbarServiceScanner and run it on the computer with the issue.
Make sure the following options are checked:
Internet Services
Windows Firewall
System Restore
Security Center/Action Center
Windows Update
Press "Scan".
It will create a log (FSS.txt) in the same directory the tool is run.
Please copy and paste the log to your reply.
Please download
MINITOOLBOX and run it.
Checkmark following boxes:
Report IE Proxy Settings
Report FF Proxy Settings
List content of Hosts
List IP configuration
List Winsock Entries
List last 10 Event Viewer log
List Installed Programs
List Users, Partitions and Memory size
List Devices (problems only)
Click Go and post the result.