This is windows XP SP3 . It install only in 'C' Drive so take your IMP backups if you want. 'C' DRIVE WILL BE AUTOMATICALLY FORMATTED. 'C' DRIVE MUST BE AT LEAST 10 GB All driver and softwares will be automaticaly installed affter you boot from DVD by pressing 2. Most of the softwares are pre-installed what you all can think Time - Less than 10 minutes Tested on many dual cores and core 2 dual AFTER INSTALLATION SETTINGS: 1) ANTIPORN IS PREINSTALLED It blocks all porn websites and some times frustrates also...so if you wanna remove just press CTRL+ALT+B and Enter PASS = saq678890 And then click on Disable ... 2) AVAST ANTIVIRUS Ver-6.0 PREINSTALLED WITH LICENSE UPTILL 2050. Open avast and click on fix... 3)IT HAS TWO BOOT MENU Choose second one to restart first three times cause it may get hang for the very first time...when windows starts after installation And You are Done !!! Enjoy.