15min Loading time for network connection?

Computer takes 15mins to fully connect to network on start up. This stops other programs from working until it is fully connected. Windows 7 circle loading graphic just keeps turning on the network connection icon on the task bar although internet connection works.

Tried turning of start up programs and reinstalling driver for tp-link tl-wn851n network card. No change to loading time.

Any ideas?


System Specs
OS Name Microsoft Windows 7 Home Premium
Version 6.1.7600 Build 7600
System Manufacturer Gigabyte Technology Co., Ltd.
System Model P55-US3L
System Type x64-based PC
Processor Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz, 2661 Mhz,
BIOS Version/Date Award Software International, Inc. FD, 11/02/2010
SMBIOS Version 2.4
Installed Physical Memory (RAM) 4.00 GB
graphics card ati radeon hd 4850
network card tp-link tl-wn851n

I have avg 9 free but it doesn't start a scan on start up.

I am connecting by wireless. . .

Resetting the router didn't help

Yes installed it using that FAQ

Any similar problems with a fixed Ethernet connection? In addition to what others said, could u try - just momentarily - disabling the antivirus software and see what happens? Is this a new machine, has the problem issue always existed from inception? Have u run a virus scan? I know u mentioned nothing was in startup but what about the msconfig utility - could u take a look inside and untick unimportant programs.