Do not attempt to use GParted to Shrink a Windows 7 Partition.
A bug in the GParted Live CD impacted how it updated the Windows boot sector if the start of the Windows partition is moved. This is one culprit but not the exclusive problem with resizing an active Windows 7 partition. In this case GParted may move the start point of the Windows boot sector at sector number 2048 instead of moving it to sector number 63.
Another source indicates that Windows 7 is designed to purposely store important boot data at the tail end of the partition. Even a very small change in the size of the partition by moving the end of the partition inward can destroy this boot data. Some recommend that you defrag your windows drive before shrinking. Even doing so the chances of a problem are significant.
Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert your Windows installation disc and restart your computer. 2. Choose your language settings, and then click "Next." 3. Click "Repair your computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. Status: 0xc0000225 Info: The boot selection failed because a required device is inaccessible.
Correct the problem using the Windows Recovery Environment (Windows RE) by booting from your Windows 7 installation media.
The repair option identified the boot sector issue and correct it by deleting the invalid location replacing it with a valid MBR.
After reboot Windows 7 automatically performs a chkdsk repair.
Problem Resolved: Use the Windows 7 Recovery Disc.
References
- Start your computer from a Windows 7 installation disc or USB flash drive
- Use Bootrec.exe in the Windows RE to troubleshoot startup issues
- Ubuntu Forums: [SOLVED Windows7 not booting after GParted resize]