hiya all my sister has a pentium 4 pc , xp pro , had norton anti virus runned fine , pc is only year old . Any way she just got new bt broadband upgrade 8 mb download and paid extra for there iss internet security and another virus software from them . she uninstalled norton loaded new software and ever since pc keeps rebooting and crashing . i thought it strange to reboot crash freeze yes . any thoughts guys as shes had to take all virus software off, and its ok now but shes not secure . could it be norton hiding on pc?