My wife's pc runs XP Pro and a corprate edition of Norton Anti Virus and there seems to be a problem somewhere. I wanted to remove the Norton and install Systemworks 05 (which works fine on my pc) but to start with the program is not listed in add/remove programs. Systemworks will install but without the virus protection as the other is still present. She has downloaded a trial version of a registry checker and when run it says that there can be as many as 42 problems only some of which it can repair without (supposidly) buying the non trial version. I ran a check disk (in normal mode) and it has not cured it. She has also tried to install a free anti virus but it cannot install it because of a "missing kernel"! I am wondering if we need to re-format the h/d (which I have never done before). I do not know what exactly is the cause of the problem and am not sure as to how I can find out where/what the problem actually is. Is the problem with the virus a symptom? If it is how can I find this corprate virus edition to get rid of it? I kinda think that the problem is h/d related but where? Anyone got any ideas please........Max!