I am using a HP laptop that has Windows XP Home SP2 edition. The security center is disabled due to some virus. It is used by my daughter and she is not really aware about the infection. I checked the firewall which was disabled and also windows update is not working at all. There are some applications which are not working fine. I had installed McAfee in that and scanned the system. There was no infection detected at all. I had used the manual way of updating antivirus. All settings in Security Center is grayed out and it does not allow me to do anything. What can be done here to fix the issue.