What Is a Hosted Online Desktop (aka Virtual PC) 
Hosted Online Desktops are servers configured to simulate the hardware and software of a desktop PC. Since servers are far more powerful than PCs, they can simulate dozens or even hundreds of Online Desktops at the same time and allow many users to work on them simultaneously.
Each Online Desktop behaves exactly like a real PC and can be accessed remotely via a small program (client application), on any computer connected to the Internet. The Online Desktop sends images of its desktop screen to the client and receives the user’s mouse and keyboard inputs in return.
This is also known as “thin client” architecture, which has been around for decades. However modern web-based thin clients are far more capable and convenient than their network-based ancestors.
Hosted Online Desktops allow users to access their desktop, files and programs to any web-enabled computer and at the same time provide significantly greater security than regular desktops and remote connections to a normal home or office PC.
Benefits Of Virtual PCs
LOW MAINTENANCE
Near-Zero Downtime since Hosted Online Desktops are backed up regularly and restored within minutes in the event of a problem
Centralized Processing All heavy processing is done on the Online Desktop servers, allowing old and outdated computers to run the most modern software with ease. As a result, users can upgrade their hardware every 6-10 years instead of every 3.
Centralized Management All technical issues are handled centrally by the server IT staff and do not interfere with users. This significantly reduces IT costs and in the case of a hosted solution, all technical issues are handled by the service provider as part of the service.
CONVENIENCE
The Hosted Desktop is virtual and online, so there is no need to buy additional hardware. It can be accessed in seconds from any internet-enabled location
Hosted Desktop client software fits easily on a USB memory stick for a portable plug-and-play solution
Hosted Online Desktops are available for a low monthly fee, with no large upfront costs
HIGH SECURITY 
The level of security which is possible through a Hosted Desktop far exceeds that of regular operating systems
The Hosted Online Desktop is built from the ground up for security and its software updates are managed centrally by IT personnel. Users never have to worry about anything except their own work
The activities conducted on the Hosted Online Desktop leave no traces or records on the local system and cannot be intercepted, making it an ideal solution for maintaining security for communications and records in the field
The Online Desktop acts as an entirely separate machine, so your computer cannot be infected or monitored as a result of any activities you do through the virtual system
Hosted Online Desktops can remove many of the headaches and security concerns of computer usage while significantly reducing maintenance and replacement costs. At the same time they can increase the accessibility and convenience of ensuring files and programs are secure.