Lost all drivers, All Hardware cannot be detected

[projectrk]

Hi Everyone,

I'm new here. I did a fresh install of Ubuntu 12.04 LTS Precise. after downloading some stuff from Ubuntu Software Center and restart. Hardware begun to fail.

I do not have my resolution or video card, mouse, wifi and etc. example before i restarted my resolution was 1600 x 900, mouse and wifi is functioning. after a restart as the system asking for restart. all of them went to fail. my resolution was set to 1024 x 768 and as i want to set them back to 1600 x 900, it cant, the 1600x900 resolution is not in the list. my optical mouse is not function same goes with my wifi.

my spec:
Laptop
Dell N7110r
i7
Intel Graphics HD

please help thank you very much in advance

[CaptinGoogle]

What output do you get when you type 'lspci' into a terminal?