Network my desktop with my laptop

Make sure the LAN driver is installed and working.
The LAN cable maybe faulty, try another one.
If the LAN cable is a red one then it most likely a crossover LAN cable. This cable is used to connect two computers together without a LAN hub or router.

To connect your computer to the Linksys wireless router using the LAN card in your computer you need to install the LAN card driver. If you want to use a wireless connection with your Dell desktop, you will need to install a wireless card on your Dell plus the wireless card driver.
For the LAN card driver, download the driver from the Dell WEB site.

You can download the device drivers from Dell WEB site,the support download page. Make sure you select your model desktop or laptop,better still, type in the Service Tag number, it is printed on the label on thebottom of the laptop and on the back or sides of a desktop. (If the Service Taglabel is missing then go into the BIOS setting and on one of the BIOS pages,the Service Tag number will be displayed). This will open the page where thespecific drivers for your model computer are located. Also make sure you selectthe Windows of the drivers for your Windows operating system. Click on thislink to download the drivers: - http://support.dell.com/support/downloads/index.aspx?c=us&l=en&s=gen

most likly a failed power supply on the switch
look at the front of the switch look for leds,.......
if you see nothing and the power cable is plugged into a hot outlet than
go down to your neerest comp store and buy a new one

my be you home network desktop has an different network range or
your desktop has configured with an ip address manually configured or
your proxy is restricting the internet to disable proxy settings in IE go to tools --> internet options --> connections --> lan settings --> and uncheck proxy
For firefox tools --> options --> advanced --> network --> settings --> noproxy

Connect the two together with a cross over network cable

Give the default gateway address of your laptop computer in the desktop computer. this will solve your issue.

The main problem on your setup is your router. This BEFSR41 doesn't have wi-fi or wireless capability. You can only go online on your laptop if you connect it hardwired to the router just like your desktop. You must purchase a wireless router if you want your laptop to work wirelessly

u can get a usb adaptor for your hard drive.

Try typing another website on the address bar.

Try checking on your router advaced setting make sure that Mac filtering is off under network filter.

Make sure all other settting on the advaced setting are also in default setting.

Your laptop should have a built in network card and 10baseT network port, if your laptop does not have a built in network card you can use either a PCMCIA network card or a USB network adapter. Your desktop computer may not have a network card, you will need to purchase a network card and install the drivers.
To connect the two computers together you only need a cross over cable. If you use a hub you can connect two or more computers together using standard 10baseT network cables.