Hi, I'm having trouble. My pc had preinstalled windows 7 ultimate along with windows 7. Former in c drive and letter in e. I formatted E to install the xp on it. Since my disk drive has gone bad, I used pendrive for installing xp. I successfully installed but the pc boot directly to xp without os list as i knew. I used easy boot to add windows 7 os entry. But i also added a xp entry because it was not shown in the os list of the software. But in msconfig only xp is listed in boot.ini file. I restarted pc and got error invalid boot.ini file booting from c:\windows. But when it boot from C drive it gives the screen which list option for safe mode, start windows normally etc. Irrespective of choosing anything system hangs after pressing enter. Please tell me what to do? Another problem is that all the drive except C And E have changed the drive letter. And all the data of one drive is deleted but of one drive in not deleted.