Can't install alongside WinXP

Question

Recently threw out older version of Ubuntu because of failure to connect to router. Then decided to try 12.10. It connects easily. Unfortunately I am not given the option to install alongside WinXP. Since the older version was so installed, I do not understand.

If I click the 'Install' icon on the desktop I get a message 'Installer has detected a mounted partition - .... unmount or not?' I do not understand the significance of this.

Can anyone please help?

Terminal info is:

ubuntu@ubuntu:~$ ubuntu@ubuntu:~$ sudo fdisk -l

Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x06060605

Device Boot Start End Blocks Id System /dev/sda1 * 63 312560639 156280288+ 7 HPFS/NTFS/exFAT

ubuntu@ubuntu:~$

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ubuntu@ubuntu:~$ sudo parted -l Model: ATA WDC WD1600AAJS-0 (scsi) Disk /dev/sda: 160GB Sector size (logical/physical): 512B/512B Partition Table: msdos

Number Start End Size Type File system Flags 1 32.3kB 160GB 160GB primary ntfs boot

Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: Can't have a partition outside the disk!

ubuntu@ubuntu:~$

Answer 1

The mounted partition problem occurs usually when you have some memory card or some other memory devices inserted.
To install Ubuntu alongside with windows Xp do following:
First you should create a separate partition with the help of disk management tool in windows in which you can install Ubuntu.
Then after booting Ubuntu from USB/DVD, you should format the free space ext4 format.
At last install Ubuntu to this ext4 partition.

Use Wubi Installer, to easily install ubuntu alongside with windows.