ANTI-VIRUS & ANTI-SPYWARE:

 ■ Avast Anti-virus - free for personal Use
 ■ HijackThis - creates a log of potential unwanted files/spyware
    (click here for online LOG scanner)
 ■ Malwarebytes

 UTILITIES:

 ■ CCleaner - automatically remove temporary files 
 ■ Defraggler - disk defragmenter
 ■ FileUsage - total folder size column in Explorer
 ■ iZarc - archive/zip/unzip tool - better than "WinZip" and Free
 ■ JDiskReport - finds what directories consume the most
 ■ Outlook Utilities - to include: "Duplicate Remover" & "Send Personally" etc
 ■ PDF to Word Converter
 ■ SyncBack - synchronise files between PC's/folders

 GRAPHICS:

 ■ FastStone - image viewer/editor
 ■ Paint.NET - image editor