Reaccuring networks problem

NOTE: i took these pictures while everything was working, but the pictures says nothing different from when its not working.

Ok, time to time i am able to connect to my router and the windows networks sharing center will show that i am connected to both "Local and Internet". So everything is fine until i try to actually connect to the internet...




Basic stuff on startup that needs i-net connection:
-Nod32
-VeohTV
-MSN
-Whatpulse

Others:
-Firefox
-IE
-few applications i tried while i had the problem

Ok, now for the actual problem. So as i said before im connected to the network, no errors in WPA-2 and nothing is wrong with the router as far as i can tell or on the surface. But when i open anything to do with the I-net it doesnt load properly because it can't connect to the i-net, except for nod32 which gives up on its own if it can't check for updates. Firefox will show the auto blank page even with the url typed in, but when i press enter/go to goto the url the page doesnt even blink or refresh. Also when i close Firefox afterwards it'll crash while closing, IE does the same thing however i can't even get to the router page (192.168.0.1.). Veohtv crashes if i try to open it, and whatpulse reattempts to pulse over and over im guessing. When i use the windows diagnose and repair option it says nothing needs to be repaired and there is no problems or it will toggle some TCP thing. The problem appears random and when it does it happens a few times together, so when i have it on startup once and restart it'll happen again and again till it stops. When its gone the problem usually doesnt show up, system restore also doesnt fix it.




OK now when its off i just usually restart and hope it connects properly, but i really have no way of checking if the problem occurs until i open up something. SO for this i use MSN because it also has the trouble shooter and unlike the windows one it actually picks up something. o.o



which i have no idea what it means....

I haven't had the problem recently, but i do want to know what to do when it happens...


So important info you might need/want:
- OS is Vista Home Premium 64bit
- Wireless card is Intel 4965AGN
- Router is DIR - 625
- Other computers can/are connect(ed) to the network surf the web/watch videos/ play online games flawlessly, while i can't

 

Have you installed or used any tweak or tune or speed up my pc programs?

also, try this command from the command prompt

type: "ipconfig /flushdns" without the quotes and hit enter and see if that fixes it. Else, try restarting your router/modem (unplug and replug them back in).

 

well i havent really tweaked my computer in a really long time, and i avoid speed up pc programs.

And i've tried the "ipconfig /flushdns" while the problem was occuring, and nothing happened i don't remember what it said exactly. But i also may not have restart right after trying it so i can't say if it works or not. ><

 

Do you have the proxy settings enabled in _Vista?

 

um im not sure how do i check? o.o

 

It show you do not have a valid DNS Server(s). If you have use proxy server checked it requires the proxy service to provide the DNS server IP's. So un-check if checked.