Posted 06 November 2010 - 09:44 PM
1. You should go into the BIOS and confirm settings and set the time. The motherboard manual usually tells you what to do here. After that, put the OS disc into the drive and off you go.
2. If you are using a standard ATX case and power supply, it should fit as they both adhere to the ATX standard.
3. I assume you are talking about XP? No, though some higher end functions, like DirectX 10 and 11 will be unavailable due to the age of the OS and certain hardware optimizations will not be used. Unless you have a highly compelling reason to use XP, cut the cord and go to Windows 7.