My home PC was recently attacked and as I bring work from the office, infected my PC at work. Had there not been a back-up I would have compromised the organization’s accounting files with grave consequences to my position. I had to re-format the hard drives and reinstall XP SP2 and other software.

I have now these security utilities at work on my home PC where I browse the internet:
• Antivirus - AVG Free and Antivir for additional scanning
• Anti-Trojan – a-squared
• Anti-Spyware – Spybot, Lavasoft , and Ewido for scanning
• Intrusion Detection – Winpatrol
• Firewall – Comodo
• Anti-rootkit – Sophos and Ice Sword

Am I not being paranoid about protection? Sometimes I feel these are too much.

Any advice?

Thanks.