Check to see if your internet setting is set for 20 mins log out, go under tools internet options in the internet connections go to setting then click the advance button an see if its set at the 20 mins log out. If it is turn that off so it doesn't log you out.
After a while I began to notice that my PC was running slowly. I decided to reinstall Windows XP like i do every September. Now my network connection to my WRT54g v6 goes out about every 20 minutes or so. So I go into my network panel and repair the connection and eveything is fine for about another 20 minutes. I have tried 3 different routers all with the same result. I have also tried 2 different network cards. What in the world is wrong? Thanks in advance.