First I would run the full diagnostics/repair CD scan from the HD maker: Hard Drive Diagnostics Tools and Utilities (Storage) - TACKtech Corp.
If you can still access Windows 7, I would save a Windows 7 Backup image externally which can be reimaged to the HD or a replacement using the Windows 7 install DVD or Repair CD, which can be made in the same Backup Center.
If the PC came with Windows 7, there may be a way to create Factory Recovery Disks off of the Recovery partition. Read your manual or browse for the utility to make a Lenovo Recovery disk set.
If you have a Windows 7 DVD then you can always reinstall your version using the activation key on the machine or the DVD insert.
Hopefully this helps answer your question which is somewhat unclear. Ask anything else you like.