Unable to boot windows7 after resizing hard disk

Would you be able to provide the output from the following two commands?

fdisk -l -u

where one of the options is a lower case "L" and not the number one.

parted /path-to-your-device unit s print

where /path-to-your-device is something like /dev/sda.

From these we can determine how to capture the Master Boot Record and the NTFS Partition Boot Record.

I'll assume that the problem is with the first partition (/dev/sda1).  If this is not the case then the skip value will need to be altered to be the correct starting sector for the boot partition.

Then we will need copies of the Master Boot Record and the NTFS Partition Boot Record.

You can capture the Master Boot Record in a file with the following command:

NOTE:  Be extra careful to type this command in properly, otherwise loss of data could result.

dd if=/dev/sda of=sda-noothaas.mbr bs=512 count=1

where sda-noothaas.mbr is the name of the file that will need to be uploaded.

You can capture the NTFS Partition Boot Record in a file with the following command:

NOTE:  Be extra careful to type this command in properly, otherwise loss of data could result.

dd if=/dev/sda of=sda1-noothaas.pbr bs=512 count=1 skip=63

where sda1-noothaas.pbr is the name of the file that will need to be uploaded.

Then upload these files to a media sharing site, such as mediafire, and post the link to these files in this forum post.

Since you were trying to shrink the partition, we will decrease the NTFS volume size to fit within the partition.

The change I have made to the file is from a length of 1,441,501,880 sectors:
00000020   00 00 00 00  80 00 80 00  B8 92 EB 55  00 00 00 00
To a new length of 588,139,586 sectors:
00000020   00 00 00 00  80 00 80 00  42 4C 0E 23  00 00 00 00

Note:  The NTFS volume size is always 1 sector less than the total number of sectors in the partition table entry because the NTFS backup sector is not considered part of the NTFS volume.

To apply this change:

1) Download the new NTFS PBR: sda1-noothaas_new.pbr

2) Load the new NTFS PBR on your hard disk.
NOTE:  Be extra careful when entering the commands.  Data loss could result otherwise.

dd if=sda1-noothaas_new.pbr of=/dev/sda bs=512 count=1 seek=63

3) Reboot the computer

4) Check that the file system is recognized in GParted

5) If all seems fine then I would advise booting into Windows and running "chkdsk /f /r" multiple times, until there are no more faults.