you could run the chkdsk utility
click start run type cmd then type chkdsk/r/f which will scan for and attempt to recovery any bad sectors and automatically fix any corrupt files on your hard drive there are many ways of running the chkdsk utility
click start right click on my computer you should see your drive usually C: select properties click tools check now tick both boxes automatically fix files and scan for and attempt recovery on any bad sectors
then select check now, start should schedule this task when restart
it will only schedule on restart if its the Primary hard drive with an operating system on it
do not do anything while the chkdsk utility is in progress any input may damage your computer
for USB drives click start control panel administrative tools computer management disk management right click on your drive select properties click tools you should see click check now click start two boxes
automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now start
you might tick one box then return after its finished the first repair then return and tick the second box you should not do anything while the chkdsk utility is in progress any input may damage this drive
I found that you get best results by ticking one box then returning after it has finished then tick the other box
hope it helps
click start control panel administrative tools computer management device manager scroll down universal serial bus controllers you could see a yellow question / exclamation mark? ! or a red X
you will need to update/reinstall drivers
right click to reinstall drivers
if you can see your usb but its not working
ports(com&lpt)right click update driver
sometimes the wires inside the cable will be damaged due to bending or stretching or placing heavy equipment upon the cable
just replace the cable of the hard disk, when you plugged the external disk drive you got that windows could recognize the USB device change the cable everything should work fine again
if you can see your usb drive but its not working
ports (com&lpt) right click update driver if this fails to fix the problem
check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems to a computer and its parts
if it still cant be detected or If the hard drive that has failed is the same one that you are trying to recover from might the reason that you are getting this error.
This could be an issue where the part of the hard drive you are trying to access is corrupt and not accessible which would explain the reason that it would let you access the other partition.
Now I have seen cases where Malware can break the link of a Hard Drive.
So let's try a couple of steps.
Let's go back in to "Disk Management"
Lets right click on the partition that you are not able to access and select "Change Drive Letter and Paths"
Now try selecting a new Drive Letter.
This will restore the path if it has been broken.
There are also Data Recovery programs that might be very helpful to recover your important information.
Downloads to Recover Your Files and Save Your Bacon and 10 Best Free Hard Drive Utilities.
Some addition links found on Googlehttp://www.datarecoveryreview.net/
http://www.easeus.com/resource/hard-disk-data-recovery.htm
or if its a usb external drive you might need a usb 3 card installed on your computer your computer might not have enough usb output
http://blog.premiumusb.com/2010/09/usb-2-0-vs-usb-3-0/
these can be purchased on Ebay cheap and easy to install
for roughly $9 or $10free postage
hope this helps
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