I've had NIS about a year now and it never lets me know if I have a virus/trojan. The only way I know is my computer gets dead slow, so then I run a full scan and when it is done it tells me it quarantined a trojan. It has taken care of 7 trojans in the last year, which is great. But I'm just wondering why it doesn't notify me of trojan unless I do a scan. I have windows 7 system.