Go into Control Panel>Administrative Tools>Computer Management>Disk Management. The drive should show up, then you can right click on it, delete the current partition (s), re-partition, then format using NTFS or Fat32 that will be visible to windows based systems.
You can certainly move Windows to an external hard drive but Windows will not boot directly from an external drive. If you are running Windows in Parallels (See links below) you can have Parallels installed on the Mac's drive and then have your Windows virtual machine on the external drive.
There's no such thing as Windows XP format or Windows Vista format. You should check however if your external hard drive uses an NTFS or FAT32 partition table. You can see that by right-clicking the drive (C, D, E, ..) and clicking properties. If it uses NTFS it will be no problem for Vista. If it's FAT32, then google for a way to convert it to NTFS. No big deal.
Assuming you're talking about transferring files from a Mac to an external hard drive (since this is the Apple / Mac section), here is one possible scenario: If the external hard drive is NTFS formatted, then the Mac will only be able to read the contents of the drive, and will not be able to write to it. To remedy such a situation, back up all data from the external hard drive, launch Disk Utility on the Mac, select the hard drive, and format it as 'Windows / MS-DOS' (FAT 32) format (if you'd like to keep the external hard drive Windows compatible), or format it as 'Mac OS Extended' if you're only going to be using it on Macs.
If you format a hard drive that contains Windows, it will be removed. Formatting a drive gets rid of all of the information on it. However, you can right-click your C:/ drive and click format, but it will not allow you if your current OS is running on that drive.
In our old computer I put a SEAGATE 500 gig External Hard Drive. The computer was windows XP Is it a working chance to use the external hard drive From The system i first installed it.
no. formatting a hard drive means completely removing all files, including windows...
You could format the hard drive
Windows 7 and Windows XP are operating systems. You cannot format operating systems. But you can format your hard disk or hard drive. You can use Windows XP bootable CD to format HDD, but you will have to use Windows 7 Bootable Installation disk to install OS on your formatted drive.
Yes. All data on the hard drive will be destroyed, including the Windows Registry.
To format the PC, insert the windows installation CD, then follow the instructions to format the selected hard drive.
When selecting the drive you wish to install the OS on, simply select the external HDD.
YES