I'm doing my best to fix a friends computer, which is failing to boot into Windows (loads the windows boot screen, messes about for a bit, then restarts the process), with the W7 install CD it fails to initialize the repair tools (although seems to be completely okay with installing a new Windows) and Ubuntu loads from a live CD but when I try and access the disk (called Acer), it presents the following:
Error mounting: mount exited with exit code 13: ntfs_attr_pread_i: ntfs_pread failed: Input/output error Failed to read NTFS $Bitmap: Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details.
(I'm not sure if I should know more before trying to access a Windows HDD from Ubuntu but have had no issues in the past, can't quite tell what the problem is.)