A day ago I installed linux mint in a separate drive (windows 7was already present in the computer). I managed the swap area ,grubs and all.The list to select which OS to be loaded came and it comes now also... When I boot the linux mint My two drives out of my five drives in windows are only seen. And when i try to boot the windows just before the moment when password to the windows is asked an error occurs. When i tried the startup repair which i thought would automatically fixes the error it couldn't solve the problem. So if anyone could get me out of this problem please help me...

Are windows 7 and Linux Mint the only operating systems?
Are you booting using Linux Mints Grub2 bootloader? or using the windows bootloader?

Not sure what you mean by that? Is this trying to access windows partitions on different drives after you have booted windows? or something else?

What might that error be?

What startup repair are you referring to? Are you tring to do a recovery/repair from windows? Using a windows CD?

yes only two os windows 7 ultimate and linux mint -9 are installed.
the Grub is of linux mint
I can see only two drives in the linux mint means that only two partitions in the windows out of five can be seen and access.excluding one of the drives in which linux mint was installed.
I tried automatic fix the problem while booting and also tried to repair the windows with the help of bootable usb drive(pendrive).but it says no drives are found . it says to load drivers... i had my laptop's drivers in one of the partitions of the windows which i cannot access now...even i tried to format the old windows and tried to install again it says the same thing "load drivers"??? help me out of this.. my laptop is compaq 510

Ok so your computer is a laptop so then you have only one hard drive (is that correct?), and when you say:
You are talking about partitions, yes? Then what you probably have is, in the windows side, boot and the main partition; and in the Linux side probably root, swap and home partitions.
And you can run your Linux, but not windows(or is windows just partially booting)? If so could you please post the output for the following command:
And lets see if we can find some clues.

Note when windows ask about some driver it refer to a software that controls a device that is probably missing.

Regards

man I have no idea what you are trying to say I may be able to help you if you clarify

i typed the command #fdisk -l in the terminal(of mint). there was no response to the command.

as i have laptop i have only one harddisk which was partitioned to 5 drives.one of my friends told that some of the partion could be dynamic because of which they are not seen in linux.is it so? i had no idea about it..
also i want to say that the drive in which i had installed windows 7(c is one of the two drives which can be seen (accessed) from the linux mint

You need to run that command as the root user so prefix it with sudo: sudo fdisk -l (that's a lower case Letter L)

Are you able to boot Mint? You need to explain in more detail what you mean about partitions not being seen. Windows partitions? System or data? And what repairs did you try and how? Did you use a windows DVD/CD to repair or?? If you have a windows system drive which you can see and another windows data partition which you cannot, that can easily be resolved by putting and entry for it in the /etc/fstab of Mint but without more info we would just be guessing.

If this computer is a laptop, you probably only have one physical drive. The "five drives" you're talking about are partitions on the one hard drive, correct? Please clarify the layout of your system.

Could it be possible that you are adding #?
# just means run as root.
$ as user.
You can either open root terminal or just terminal.