Ubuntu for me or one of its clones. eg I run Xubuntu under VMWare as a virtual machine on a laptop. This gave me the opportunity to learn a little about Ubuntu and at the same time run Windows XP Pro for my work etc.

I tried Ubuntu 64 bit recently and managed to prove to myself that ABC@ Home does indeed perform twice as fast under 64 bit as under 32 bit. I had some hardware problems and had to wipe that HDD so its on Win XP again now.

One of my computers has Vista Home Premium. I hate it. The most annoying "bug" is User Access Control; yes the Mac versus Windows adverts are hilarious but true. I'm waiting for SP1 to see if some of the stupidity of the OS gets fixed. eg. I said BOINC could start-up each time I restarted the PC but Vista won't allow it, even with UAC disabled. While I'm waiting this Quad Core 6600 runs BOINC RieselSieve 24/7.