Problem with WLan drivers on Dell Inspiron N5010

I've recently bought Dell Inspiron N5010 laptop, however there seems to be one small issue: can't get WLan drivers installed.

I'm using Windows 7 (64x edition). On Device Manager, under "Other Devices" there is an unknown "Network Controller".

Tried installing drivers from Dell Drivers & Downloads section (yes, used my service tag), but there was a problem with following ones:

-  R252544 for Dell Wireless WLAN 1520 Half MiniCard. Result: "No compatible hardware found. The software you are attempting to install is not supported on this system. The software will not be installed."  Half Mini Card

- R247430 for Intel Intel (R) WiMAX Link 6250. Result: "This software package cannot be installed on your system."

- R252283 for Intel Intel(R) WiFi Link 6200 "No compatible hardware found. The software you are attempting to install is not supported on this system. The software will not be installed."

All these messages appear right after running setup. Other drivers were installed successfully and in the right order.