Trend Micro Anti-Threat Toolkit is a system cleanup tool which detects and cleans some malware types on demand.

The company says there's support for removing rootkits, Zbot, Cryptolocker, master boot record infections, CIDOX/ RODNIX and "general malware".

The program doesn't provide any real-time protection, and there's nothing complex to configure: it's strictly a rescue kit only, something to download and use if you've been infected and need to clean up.

The process starts by choosing the right version for your system: 32 or 64-bit? In addition, this build assumes your system is connected to the internet. If this isn't the case, download the Offline version here.

Run whatever you download as an administrator. By default the program runs a "quick scan", although that's hard to believe as it seemed slow to us. But if you click Settings you can choose the scan type or location.

Once you're happy, click Scan Now and wait. When the Toolkit has finished, any threats found will be listed and you can remove them all with a click.

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With no real-time protection, Trend Micro Anti-Threat Toolkit is strictly for emergencies only. Still, independent testing generally gives Trend Micro's engine very high marks, so if you have been infected there's probably a good chance that the Toolkit can help.