I reset my Toshiba laptop to factory settings and now I can not access the wireless internet.

You need to reset the cisco E3000 router back to factory defaults; This will allow you to login to the router and set it up again as if it is being setup for the first time.

Most routers have a "reset" button usually requiring a pen or a paper clip to access and press the button. Usually holding this button down for about 30 seconds will reset the router to default settings.

Then you will need to use the instructions manual to setup the router again. This will allow you to set the wireless password again to gain access to the wireless connection again.

If you don't have the instruction manual, usually you can download it from the manufacturer's website for the respective router. In your case the Cisco E3000.

Hope this helps.

Try resetting the wireless router back to to factory defaults.
To reset the Linksys back to the default settings -
Press and hold the pinhole RESET button at the back of the router with the power ON for 20 secs. then release the RESET button.
To connect to your wireless router, the router's wireless settings needs to be configured with the SSID, encryption etc. and also the wireless cards in all the laptops/computers needs to be configured with these router's wireless settings. Then the laptops/desktop computers can communicate with your wireless router.
Connect a LAN cable from the Linksys to the LAN port on your computer.
Open a browser and enter the Linksys configuration URL
http://192.168.1.1
The default login = admin
The default PW = admin
You can protect your router by changing the default admin PW (write it down and put it in a safe place)
Go to the wireless configuration and set up the SSID and WPA or WPA2 encryption to protect your wireless network and Internet from unauthorized access.
Now apply these settings to the wireless card in your laptop/computer.
To secure your wireless network from unauthorized access, please click on this link and follow my instructions :-
http://www.fixya.com/support/r3559128-wireless_router_security

Try resetting the router.
To reset the Belkin back to the default settings -
Press and hold the pinhole RESET button at the back of the router and then power for at least 15 secs. Then release the RESET button.
Connect a LAN cable from Belkin to your laptop/computer's LAN port, open a browser on your laptop/computer and enter the Belkin's configuration URL. http://192.168.2.1
The default PW = blank (just press Enter) You can now change the default admin password.
You can now configure the wireless settings. Now configure the wireless card in your computer/laptop with the router's wireless settings. To secure your wireless network from unauthorized access, please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

You can always reset the router and start over. Use a straightened-out paper clip or the point of a pen to press the recessed reset button on the router's rear panel. Hold it for 10 seconds or so and release it. The router will restart, and then all its settings will be back to factory default. Go through the wireless network settings again and you can set up a new passphrase.

Is still there Win7 working with your laptop ? As i can get you that you have reinstalled your Laptop with Win7 and you cant access your old software and setting from the original as it was shipped to you am i right ? And you want it back to reset to the old setting ? For that you can use the CD/DVD you might have got with your laptop ?

... and your problem is _________________________ ???

With an Ethernet cable, connect the "wired" port on your desktop/laptop to one of the "wired" ports on the router.

Access the router's built-in web-server, and "reset" the router to "factory-settings".

Then, run the "Wired Networking Setup Wizard".
Then, run the "Wireless Networking Setup Wizard",
to configure your wireless network, for up to 250 wireless devices (iPod Touch, laptops, et cetera).

Hello,
the passphrase is a security that is attached to the wireless router you are using, you can contact the person that configured the router to give you the passphrase or you can reset the router to factory setting by pressing the reset botton for 5seconds

normally there is a small hole for reset to factory default, just put a pin inside...
Other than that, u can also connect using network cable and access the router configuration, inside, u can edit the wireless security keys

For virtually any router, wireless access point, or modem, you will find a tiny round hole just big enough for an unbent paper clip to be inserted. The word reset may be next to that hole, but not always.

Pushing the unbent paperclip into that hole firmly for 10 to 30 seconds will reset the device to the original factory settings.

If you have the quick-start guide or manual for the device, you can use that to set it up. If not, visit the web page for the company and look for tech-support or downloads to find the manual for that particular device. You can also Google the actual device and part number information along with the words 'manual' or 'setup' and find the page that way.

We will try a  hard-reset the D-Link Air DWL-700AP to the factory default settings, please dothe following:
Locate the reset button on the back of the DWL-700AP
Use a paper clip to press the reset button
Hold for about 5 seconds and then release
After the DWL-700AP reboots (this may take a few minutes) it will be reset
to the factory default settings.

then do a fresh configuration,
http://209.85.175.104/search?q=cache:Hm3Vs8XnH3QJ:wireless.cisbg.com/soft/Dlink/dwl700AP/Manual/dwl700ap_manual_102.pdf+D-Link+Air+DWL+700AP+802.11b+protection+code&hl=en&ct=clnk&cd=1&gl=in

the above link is the installation guide for setting up your Dlink wireless