Probably not without additional tools. Most Windows XP installations use the NTFS file system, which Windows ME cannot read. There are some programs that can read NTFS partitions in Windows ME, as can be found in the "Related Links" section below.
If you formatted your hard drive between the OS installs of 98, 2000 and XP, it would be difficult to retrieve files and programs from previous installs. There are tools to retrieve deleted information, but if the deleted information was already re-written, which is likely the case when installing new operating systems (depending on the hard drive size), it would be impossible to get those old files back.
Yes, if the computer is connected to a network there are options for installing Windows that way.
No. Installing Linux is no more destructive than installing Windows.
There are no real risks. That is the beauty of virtual machines.
This is likely to be difficult because older software does not always support new hardware. You would need to format the drive and start fresh, or I would suggest installing a new hard drive and installing from scratch. That allows you to recover quickly if your experiment fails.
Yes, you can remove a hard drive from an older computer, place it in a new computer, and format it. Simply formatting it will leave it with no operating system, and thus useless in the Windows 98 computer. Installing Windows 98 to the drive from in your new computer may be difficult if your computer exceeds 512 MB of RAM, or if you use a SATA CD/DVD drive. Installing Windows XP to the drive might not work when placed back into the older computer if it doesn't meet XP's system requirements.
If you mean - to use a USB drive to boot up your computer instead of installing the software on the computer's hard-drive - theoretically, yes. HOWEVER - if your USB stick went faulty or you lost it - you wouldn't be able to use your computer !
While windows is installing
You will have to format you hard drive and re-install ME from scratch. Make sure you have backed up all of your data as this will be destroyed during a format
Windows 98 cannot interact with the Windows NT file system. To install Windows 98, you will need to use a partition tool to divide the hard drive, and then install a special boot manager to load them both.
I would suggest installing windows on one hard drive, then installing ubuntu on the same hard drive. Use the other hard drive for the backups (partition it).
Nothing is missing you just need to reinstall windows completely again.Follow these steps while installing windows.Just connect the CD Drive and a hard disk in which you want to install windows.Turn on computer and Insert CD in CD Drive.Computer will automatically detect boot from CD.If the boot is not selected then select Boot from CD.Install windows using installation wizard.Turn off Computer and then connect all drives in correct ports (SATA ports).Turn on Computer and press F2 at the First page displayed for bios option.Change the boot order of drives such that the first drive is the drive in which Windows is installed.Save changes and exit Bios.Then the computer will turn on.