Cant use Broadcom wifi on my LenovoG500 Laptop

ejac@ejac-Lenovo-G500:~$ lshw -c network
*-network UNCLAIMED
       description: Network controller
       product: BCM43142 802.11b/g/n
       vendor: Broadcom Inc. and subsidiaries
       physical id: 0
       bus info: pci@0000:02:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: bus_master cap_list
       configuration: latency=0
       resources: memory:e0400000-e0407fff

ejac@ejac-Lenovo-G500:~$ lspci
02:00.0 Network controller: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n (rev 01)

• I've done an update & upgrade them following up this instructions: Installing Broadcom Wireless Drivers

• I've purged the bcmwl-kernel-source

• updated the pciids

• installed the bcmwl-kernel-source

• installed the linux-firmware

• rebooted

• update & upgrade again

yet I still don't have WIFI.

Additional logs as requested:

ejac@ejac-Lenovo-G500:~$ sudo modprobe wl && sudo dmesg | grep wl
modprobe: ERROR: could not insert 'wl': Key was rejected by service
ejac@ejac-Lenovo-G500:~$ rfkill list all
0: ideapad_wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no
1: ideapad_bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: no
2: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
3: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no

FIXED: As stated by chili555 disabling the secure boot from the BIOS fixed the problem. I have wifi now. I have no idea why secure boot would interfere with broadcom drivers but thank you chili555.