Acer netbook freezes till it connects to the internet

First off I am not all that much of a "tecnical" person so I may need simple languge.

About five days ago my netbook started to take a realy long time to find and connect to my wirless internet. last time it took around thirty minets. Not only that but while it is still connecting If I try to bring up any thing it will freez. I can not even pull up microsft word or the start menu. however in safemod it only takes a few seconts to find the connection and conect.(That is how I am able to get online now.)
so far I have run every anti virues program I have(which did not come up with any thing other then traking cookies) , uninstalled all the programs I can with the exeption of the ones that came preinstalled and microsoft office. I have also ran defrag and cleared out my brouser history. lastly I tried disconecting from my wirless signel in safe mod then restarting in reguler mod. All of this with no luck.
I am also farly sure that it has nothing to do with the motum or the internet as both of my moms laptops work just fine.
does any one have any idea why it is doing this or how I can fix it?