Problem whit internet.

Could you open a terminal, type 'lspci' and show us the output? We will then see the exact hardware you have. It is quite probable that Linux-libre (Trisquel's kernel) does not support your Wifi chipset. You could then buy an adapter from ThinkPenguin ( http://libre.thinkpenguin.com ) or Tehnoetic ( http://tehnoetic.com ), which are the only two vendor that guarantee that all their hardware works with Linux-libre. As for the Ethernet connection, it is quite surprising that it does not work...

00:00.0 Host bridge: Intel Corporation Mobile 945GSE Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 2 (rev 02)
00:1c.3 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 02)
00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 02)
00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 02)
00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [IDE mode] (rev 02)
01:00.0 Network controller: Ralink corp. RT2790 Wireless 802.11n 1T/2R PCIe
03:00.0 Ethernet controller: Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0)

Please based on this information, there is a chance to use it WI-FI or not?

No, that wifi card requires nonfree firmware. You should get a USB wifi adaptor from Thinkpenguin or Tehnoetic.

or an atheros wifi adapter series AR9xxx or AR5xxx (very cheap on ebay) and open your laptop and replace your RT2790 with one of those.

Thanks!