wireless NW driver not working after installing Win7 on dell insp 1545  

Hi folks,
I am using a Dell Inspiron 1545 which came with win Vista originally. i upgraded this to windows 7 (64 bit).
after upgrading, i am not able to use WiFi. (LAN is working fine and BT is also working fine after reinstalling BT driver).
I don't see any entry for wireless network hardware in "network adapters" in device manager. i could only see LAN hardware. also, i couldn't see wireless network connection option in "change adapter setting" option.

I installed drivers from dell website but i couldn't install them. e.g. R246753, R228532, R248337.

Could you pls help in this regard whether i am installing wrong drivers OR there is some other problem?

Hi Maxie,
Thanks.
I did the procedure suggested by you. i installed chipset drivers (R237653, R228482). i couldn't find any series 4 drivers. function keys are working fine.

but still i am facing same issue as earlier. following is error message which i get when i try to install wireless network drivers (R248337/R246753/R228532) for Win7 (64 bit). please suggest what should i do further?

the device may not be present or could have been ejected/unplugged from system.

aborting the install,, please insert the card again and try the installer again.

I installed this Intel series 4 driver (Win7Vista_64_151719) from the web link provided by you which was successfully installed and after that i tried to install wireless network dell drivers for Win7 but still same error pops-up. I am not able to use Wi-Fi.

tried all these options as well. no luck

when i was using Windows Vista (32 bit), it was working fine.
then i broke LCD display and replaced it. after that i installed Windows 7 and it stopped working.