ONLY FOR 64BIT CPUs Windows Vista x64 Ultimate PRE-ACTIVATED. INFO: IMPORTANT NOTES: This is the 64bit version of Windows Vista Ultimate (English). So, to install this operating system, you must have: =>1. a cpu that supports 64bit =>2. the 64bit versions of your drivers (for graphics card, sound card, etc.) How to detect if your CPU is 64-bit: -->1. Download & run cpuid: CPUID -->In the first tab check the line where it says "Instructions" -->If it says something like: x64 or EM64T, then your CPU is 64-bit. If you want to know more about 64bit computing, check: 64bit - x64 - Home This version of Vista is PRE-ACTIVATED. It is an exact copy of the DVD that DELL uses in some of its computers. So, with this version, you have: =>1. "Genuine Microsoft Software" in your System Tab =>2. You will never be asked for a serial =>3. You will never be asked for activation =>4. The Windows Update feature works fine. You can get all the updates from Microsoft You just have to download it and install it. Just simple as this. DOWNLOAD: Code: http://protect.tehparadox.com/66edd361! Filesize: 40 x 95.00Mb + 1 x 36.30Mb = 3.84 Gb Unrar the file and you have the required .nrg (image file) to burn in DVD with Nero Burning Rom. All the files have been xxxxxxxx by me. If you find a broken link, please let me know. I have been using this version of Vista for about six months and never had a problem. Password for all files: Code: [email protected] eNJOY!