Here are some links to helpful resources.

Mozilla Firefox is a free open source Web Browser, which doesn't suffer from the same security issues that Microsofts Internet Explorer does.

Mozilla Thunderbird is a fantastic open source free e-mail client.

AVG Antivirus is a high quality Anti-Virus Application which is free of Charge for Personal Use.

OpenOffice is a completely free and highly functional suite of Office Applications, fully compatible with Microsoft Office files.