Comment Works great on my 7-year-old Dell (Core 2 Quad) (Score 1) 405
Granted, it is a little beefier specs-wise, but I have the Win 10 Pro 64-bit Preview installed on a Dell Inspiron 530 from mid-'07 and it is running great. It is a Core 2 Quad 6600 (2.4 GHz), has 6 GB DDR2 RAM, a 120 GB Crucial SSD (hacked BIOS re-enables AHCI that Dell removed), 1 TB WD Blue HDD and a 1 GB Radeon 6450.
It works fine, plays 1080p video with no issues but is loud and puts out a lot of heat (105 watt processor). I am looking forward to replacing it with an Intel NUC later this year when the Skylake models are released. About an 80% reduction in power consumption with better performance.