You can try for some virtual machine that can evaluate new software applications and is capable of browsing the web safely. Using such VM on the main machine, would enable to run one or more separate virtual machines.

I hope this helps.

You can also try
http://www.sandboxie.com/
which is the less circumstantial method compare to a VM but may not fit your requirements

Right, by doing so, you can safely evaluate new software applications and browse the internet without introducing threats to their work computers from software still in development or from online malware.

You can install and run software applications in VM to evaluate features and functionality without risk of operating system or application compatibility or stability issues with their work computer. Using some complete PC environment, including operating system and applications, get the true end-user experience from each application.

That´s true. But also suggest some “complete PC environment, including operating system and applicationsâ€, as you said. As far as I have searched, dint found any such comprehensive solution available in the market.

There are at least two

Virtual PC 2007
http://www.microsoft.com/downloads/details...&displaylang=en
which is good when working with a single virtual machine and you do not want a bloated solution

VMware Server 1.x / 2.0
http://www.vmware.com/products/server/
2.0 is a completely web based solution which can be used from anywhere and can easily handle multiple virtual machines

both are free and there are many more solutions freeware and open source

right now I am working with VMware 2.0 beta 2 and its working pretty well .. plus - what is more interesting for me - it has a well documented and good working API (VIX API) to control the virtual machines from your software

Well, vmware and microsoft ar providing good offerings but they can't beat the solution that MokaFive is providing. MokaFive has an impressive technology that is easy to use and to apprehend. Using MokaFive´s LivePC technology, allows to keep an up to date secure remote terminal with key team members no matter where you are to ensure rapid response in the event of a disaster.

For which you can visit:
http://www.mokafive.com/

With the help of MokaFive Live PCs, the Trademark attorneys can safely go online to any web site to stay current on intellectual property issues that may be important to their clients. They can even browse websites anonymously by using a LivePC created with special anonymity capabilities, such as the freely available “Fearless Browser†LivePC from MokaFive.

Well, MokaFive really worked for us. MokaFive´s LivePC have worked so well for us that we are planning to expand our use of them to new areas such as in court when we need internet access, but we don´t want to use a browser on one of our personal laptops. Carrying a web-enabled LivePC on a USB flash drive will save us the expense and hassle of carrying an extra laptop around.