Real-time protection: Avast 6!
You are using Avast6! Free ..right?
Additional on-demand scanner:
Hitman Pro (Trial) -
link
An on-demand scanner using multiple anti-malware engines and cloud technology. It offers unlimited free scanning but once you use it to remove detected malware it switches to a 30-day trial version. I recommend using it after you've scanned your hard-drive with the other products you have installed.
Additional browser plugins
VTzilla (Free) -
link
VTzilla is a Mozilla Firefox browser plugin that simplifies the process of scanning Internet resources with VirusTotal. It allows you to download files directly with VirusTotal's web application prior to storing them in your PC. Moreover, it will not only scan files, but also URLs.
The scanning options are embedded in Firefox's context menu and download dialog, making the analysis process as easy as clicking a single button.
More Info
LastPass (Free/) -
link
LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Virtualization:
Sandboxie (Free/Paid) -
link
Sandboxie runs your programs in an isolated space which prevents them from making permanent changes to other programs and data in your computer.
More details -
link
Extra protection:
EMET 2 (Enhanced Mitigation Experience Toolkit) (Free) -
link
EMET provides users with the ability to deploy security features built into Windows to arbitrary applications. This helps prevent vulnerabilities in those applications from successfully being exploited. DEP, SEHOP and ASLR are such security features, if you want to learn more about what they do, you can watch this
video from Microsoft TechCenter. To configure EMET you should follow this
guide by rationallyPARANOID.
What tools are you using for maintenance?
Any type of backup?

fftopic: - :welcomewave: