Windows 2000 Pro is still running fine for me. Early this month, I bought a IBM ThinkPad T42, in pristine (like new) condition. It arrived with the original OEM XP Pro, freshly installed.
I looked in my box of spare accessories, and found a brand new Hitachi 60GB IDE HDD that was a drop in fit. It was bought 3 years ago for a prior Dell Latitude D610 that I had up until a year ago, and had actually forgotten that I purchased it (still in the unopened package, with the HDD sealed).
So I left the OEM ThinkPad HDD as is, and created a dual boot on the new HDD (2K Pro, XP MCE edition), and added a data partition also. Windows 2000 runs nicely on the ThinkPad, IBM (now Lenovo) still had the original drivers for the OS, although I had to manually install them. They have an auto updating site for current supported OS's only.
Windows 2000 Pro, although an aged OS, is still quite useable. There are still options for some of the latest browsers (FF & Opera), but not for the latest Adobe Reader, Flash or Java, although there are versions of each still available from File Hippo that works fine. There's still plenty of software available for the OS. Also, being that it's in a dual boot with XP MCE, it still benefits from software that won't install on the OS (such as defrag software).
There are still a few AV/IS solutions that works well with the OS also. I'm getting ready to move forward from NOD32 AV (it expires next week) to ESET Smart Security, the trial version runs well on 2K. Adding Malwarebytes Pro really helps a lot, it's a lifetime subscription, and can be found at Newegg for as little as $9.95 (on promo). It's imperative that if one is going to use this OS, to run a modern browser (like FF or Opera) & a paid AV/IS solution. Avast Free is OK, but there is where Malwarebytes Pro becomes a must.
There is also an "unofficial" SP5 that was written for Win 2K, but due MS pushing XP at the time, it was never released. It's a great SP to add to the OS. For starters, it moves you up to IE6 w/o having to find a link to d/l it from (Windows Update doesn't work with IE5). The unofficial Win 2K SP5 can be found here:
|MG| Microsoft Windows 2000 Unofficial SP 5.1.2195 Download
Just download it & run it, it can even be slipstreamed into the install disk. It's no different from installing other SP's. There's a ton (over 400 updates & hotfixes) there.
For the most part, Windows 2000 has been kicked to the curb, but for those who has the hardware to run it, it's still a adequate OS for basic needs. And BTW, I've ran it since 2000, and have never been infected with a virus or malware from it, although there were those who claimed that the OS had "thousands" of holes in it (one is a well known MS article writer, Mary Jo Foley). Whether it has or had those holes, I don't know, but I can say that I've been secure running the OS.
Cat