Focus not working, I think due to virus

Hello, I have the Panasonic Luminix DMC TZ5 model. 2 days ago the zoom and focus were not working properly, when I turn the camera on it automatically focusses on whatever you point it at but as soon as you try to zoom in or out the focus goes blurry and cannot be brought back inot focus. Also when I switch it off it is not going off straight away as it normally does. Ordinarily I would take it to a camera shop but I am travelling in remote Cambodia and nowhere ear anyone who can assist. Someone suggested I may have a virus and so I had my memory card scanned and it did indeed have a trojan virus which has now been deleted. The problem is that the camera has not been fixed by this and I am wondering if the virus has affected the cameras internal memory and somehow the focus/zoom. Please help, Katie