WiFi connection lost on startup

Hi guys.

I've searched on here but I've not found a solution.

For the past 2-3 days everytime I startup my Vista 32bit laptop my WiFi connection is missing. If I click on diagnose and repair it says Turn on WiFi connection, if I click on that message it connects no problem. The thing is why do I have to re-connect everytime it starts up.

I checked the Problem Reports and Solutions in Control Panel and it says:

Product
Network Diagnostics Framework
Problem
Unable to diagnose/repair network problems
Date
08/12/2012 14:14
Status
Report Sent
Problem signature
Problem Event Name: NetworkDiagnosticsFrameworkV2
Vendor: Microsoft
OwnerHC: AutoConfig Helper Class
OwnerHCVersion: 1.0
SessionStatus: 5
HRESULT: 0
Repair: {2815EAA6-357D-4502-B3FF-6CB1D28BA282}
RootCauseHC: AutoConfig Helper Class
RootCauseHCVersion: 1.0
RootCause: {3473D046-2EFF-4834-9FD1-C8224BE5BCFC}
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 2057
Extra information about the problem
Bucket ID: 88820822

Now I've never had a problem with the WiFi connection in the past 3 years so why as it started now?

Surely if there is a WiFi connection it should use it everytime it starts up without turning it on.

Would you believe it, this morning it started up as normal when the last 2-3 days I had to Turn on WiFi connection, stupid Vista.