Original post : Windows System Restore - Guide for Windows XP, Vista, 7, 8, 10.
You can't use the restore utility if Windows XP is unbootable. If you can't boot into Windows XP, go to Download restore disk to restore your PC.
If you're not able to run Safe Mode because of a boot error, download our disk Easy Recovery Essentials that can automatically fix boot errors using its Automated Repair features (read features list).
Once started, System Restore may not be interrupted and cannot be undone until after it has completed. Are you sure you want to continue?
If you no longer have the original installation disk, go to Download restore disk.
Go to Use Easy Recovery Essentials to restore your computer or fix boot errors automatically.
sfc /scannow /offbootdir=d:\ /offwindir=d:\windows