Acer :: Internet - 8930G

My notebook is Acer 8930G and my network adapter is an Atheros AR8121/AR8113/AR8114 and i used to have as a wired router a Dlink 524T, which i changed with a Netgear DG834 during my many attempts to resolve in vain my internet problems as i did with my ethernet cables.

About a week ago,suddenly my notebook ceased to have any internet connection and my status varied from local only to limited connectivity while both the green and orange lights on the adapter came and went continiously.

After a casual scan with Malwarebytez antispyware,it turned out that i had 9 infections from the trojan BHO,which turned out to origin from Acer itself,as it was part of the recovery hidden partition.This trojan appeared as Partner BHO that ran as an add on to Internet explorer and was part of the Acer-Google toolbar present at IE.

After innumerable efforts and formats,i somehow cleaned(so it seems without being 100% certain) my PC.The only thing is that the problem persists with the connection,while two other computers that share the network with me,didn't and still don't have any problems whatsoever.

My Atheros adapter functions as follows:The green light on the right is stable for a few seconds subsequently dissapears for an instance and then returns while the orange light beeps only at the presense of the green light.My network status vary from Local only to limited connectivity most of the times and sometimes it turns to no connectivity.The device manager indicates that all devices are working properly without any explanatory or question marks underneath any of them