Review: Win4Lin Puts Windows on Linux Desktop

While not perfect, it has many benefits: 1) Run Windows and MS Office from within Linux without having to dual-boot. 2) A crashed Windows session can simply be re-started from Linux and won't bring the entire system down. 3) Runs as fast as native Windows. 4) Provides a smooth migration path between Windows and Linux. 5) Costs much less than its competitor VMware.

Most Linux systems have a dual-boot prompt in which you can choose which operating system to start at boot time. This allows both to co-exist on the same computer. If you've used the feature for any length of time it quickly gets tiresome having to reboot, bring up Windows, do what is needed in Windows, then reboot again to Linux. Win4Lin changes all of that by treating Windows as simply another program. A product overview on the Trelos site gives the technical details: '...tight integration with both the Linux filesystem and network stack,...[results in] no need to create separate partitions or configure additional networking services. This results in lower system overhead, higher performance, and ease of use.'

Problems with Win4Lin: you have to own a copy of the real deal Microsoft Windows. The 100% open source Microsoft free alternative, WINE, is not near completion and may never be since it has to clone Windows bugs as well as Windows functions. The other open source project Plex86 takes a virtual machine approach like Win4Lin's competitor, VMware however, Plex86 is only capable of running DOS 6.22 at this stage. VMware has better application compatibility and supports more hardware at this time, but it is resource hungry and does not perform as well as Win4Lin. Installation of Windows 98 was extremely slow. VMware takes a virtual machine (VM) approach in which it emulates an entire PC. The installation interface and documentation is better than Win4Lin, but VMware costs much more at $299 or $99 for a student edition. Win4Lin costs $35. I'm told that adding RAM makes Windows performance with VMware comparable to native. VMware's site recommends 128Mb minimum. Win4Lin's performance was superior to VMware's and comparable to native Windows. Update: The discussion below pointed out one final competitor is Bochswhich is a x86 software emulator.

Win4Lin installation guide needs improvement, and the installation user interface is somewhat clumsy. While not difficult to install, the instructions can be fragmented and sketchy, sometimes leaving you guessing as to whether you should be installing as root or as a regular user. But after the installation hurdle is passed, it is remarkable how well it works. It was eerie to see MS Internet Explorer running happily on Linux.

There are limitations with version 1.0 The biggest are no sound, com or serial port support (but there are patches available, see below) as well as only being able to run in either a fixed-sized window or full screen, but can't be switched on the fly. Right now that means that it will only work on a 1024x726 or higher resolution screen for a window. Printing is supported and is simple to setup provided that a default Linux printer has been setup previously. Version 2.0 is currently in beta.

While limited, the product is very useful. In the reality of a Windows and Office dominated desktop, this is a very necessary bridge betwen the two that relieves the dual-booting chore. At $35 with a free upgrade to version 2.0 when available, it is well worth the price and is an example of a hybrid closed/open source system that will likely be the norm for the future.

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