Ok so my sister logs into her account and it is soo laggy - When she tries to browse internet and play itunes the system completly locks up. So i took a look and saw that on a restart firefox is running 4 or 5 times. It isnt even set up in msconfig - anyone know what to do as it uses 100 % of the CPU according to task manager and she cant use her account however my accountant is superb.