Hi
I have dual OS, C:Vista and D:XP on Toshiba Satellite L300-1FQ.
1. I want to delete Vista, how can i do that without formating my Hard Drive.
2. At present my Hard Disk is in Compatibility mode, need to set to SATA, how?

to uninstall vista u hv to format that partition.insert windows installation disk and format or delete that partition.option to set sata is located somewhere in bios.

Do the bios settings stuff first.

You may have to have the XP disk in hand when deleting the C: root - format it is the best bet but the OS may have boot MBR issues after the deletion or formatting. So you'll need to do the XP disk and first try the Recovery process to add the boot MBR to the current D: root.. BCDEDIT.exe from the command prompt.

Try this if you don't want to format the drive. - locate the free version of EasyBCD 2.0 Install it. Change the default boot to the XP then delete the Vista listing. Reboot the system. Vista should not be there as a boot loader. Then simply delete all folder files on the Vista drive - be sure to have the "Explorer" view set to show all hidden files. Oh in some cases you might have to change the properties value by un-checking the check box on the read only setting for the files and apply it to the folder and all sub-folders...

I am not sure if this fails what to do and not do another install of the XP..

Good luck!

Do the bios settings stuff first.

You may have to have the XP disk in hand when deleting the C: root - format it is the best bet but the OS may have boot MBR issues after the deletion or formatting. So you'll need to do the XP disk and first try the Recovery process to add the boot MBR to the current D: root.. BCDEDIT.exe from the command prompt.

Try this if you don't want to format the drive. - locate the free version of EasyBCD 2.0 Install it. Change the default boot to the XP then delete the Vista listing. Reboot the system. Vista should not be there as a boot loader. Then simply delete all files on the Vista drive.

I am not sure if this fails what to do and not do another install to to the XP..

Good luck!