Try going back to device manager, removing the adapter and rebooting.
Power management is always a pain when it comes to networking, since the whole concept of networking is built around the idea of high availability and up-time and your laptop is built with the whole green environment concept in mind there is inherently a problem. Which might be compounded and complicated by poorly written software (drivers and or manufacturer's proprietary power management). You can change any number of settings in various places within Windows 7 (device manager, control panel power settings) to prevent this, but it will in all likelihood also prevent your laptop from sleeping and or hibernating, etc,.
First double check and make sure you still have the 9.2.0.113 driver installed and that removal and rebooting hasn't replaced it with some generic microsoft driver.
It is possible that your Router Manufacturer has a firmware upgrade available for that router but I cannot find a D-Link DIR-300 anywhere on D-Link's site. And a revision number is the number of the current software installed and should be on a label, possibly on the bottom of the router, if not then you can probably assume it is the first iteration of router's OS.
Have also read a couple complaints regarding the particular wireless card installed in that laptop as being "weak", so consider that proximity might be an issue regardless of what signal strength any software is indicating and move the laptop close to the router for testing.
Since the problem still exists, I will spout some more observations.....
Your lease is one day, which I will assume is set in the router that way.
Your IPCONFIG readout seems to be mising some things, which may be normal for you or you removed them for security.
Win IP Configuration
Primary DNS Sufix
DNS Suffix Search List
Ethernet Adapter
Connection Specific DNS Suffix
Just seems strange these are all related to DNS
I always disable the other Network Adapter if I have two installed. So I would try disabling the wired one if you have not already.
Since the connection is lost when the system sleeps, the fact it worked before may have meant the settings were just right for the connection to be made. Since it lost that one, it seems to be having problems making another one. So along this line, I would check the router and set a channel like 7 or 8 for testing. Then from the wireless, use the ipconfig /renew to see if it will resync.
I suppose clicking the wireless symbol in the System Tray does not list any wireless networks and therefore no signal strength?
Sorry if I am repeating prior tries...
Edit: You do have the router set up to broadcast the SSID?
ok, third round.. ceased working again.. it stopd 3 days ago, but i was busy with other stuff so i didn`t post it.... it worked for like 25 min the last time... i restored the PC to factory install... nothing... and now it's the same thing, but with one more detail... the name of the network appears wrong, for example :
gdematos appears gdematks and it trades other characters i=j...
maybe it`s just an hardware issue...
That looks like it could be data corruption - losing/picking up bits. That can be due to connection speed problems (have you got both pc and router set to use the same wireless protocols rather then automatic setting. Also could be due to "noise" - it's one thing to have a good strong signal but you can get too close (like having your ear too close to a loud audio signal) and suffer overload.
I've not read the entire thread, so sorry if any of this is redundant...
Check Firmware
Power cycle modem & router, don't repower the router til 30 sec s after the modem locks
Check Update Driver for Wireless card
Router Channel is likely on Auto; try other channels. If it is due to interference, you may need to set to a channel that is not being affected & sometimes Auto doesn't find the best channel
Also, there should be a 1-800 # for your router's Support Help Desk... might be worth a shot.
Cheers,
Drew
Well, then, give it a call... certainly can't hurt to try that, now...
Drew
In that case...
Try another wireless card. You can hard-wire ok? Is the anntena ok? So the problem is in the PC not, the router? Swap out the wireless card... eliminate any hardware possibilities.
Drew