The company said it would continue to support existing customers through to the end of their subscriptions, but it appears that the search giant has no plans to relaunch the software.

GreenBorder made a Windows security tool that isolated the browser in a sandbox that blocked web-based malware such as bad browser helper objects and hijack attempts from installing on users’ PCs.

The acquisition appears to be one designed to bring technology and expertise on board, rather than one designed to reach new customers or revenue streams.

The most obvious application of the newly bought technology would be to include it as a part of the Google Toolbar, a browser plugin.

Google is not a total stranger to the web security space. The company is a prominent member of the outreach group StopBadware.org, for example.

While its algorithmic web search results have for several months alerted users to links that lead to potentially dangerous web sites, the company has come in for criticism recently for failing to filter out Adwords ads that link to malware hosts.

Google also includes Norton Security Scan, an antivirus tool from Symantec, and Spyware Doctor from PC Tools, as parts of its Google Pack software bundle.