duel boot opensuse/windows - Windows needs repair
 

The windows partition will attempt to boot. No options work. I thought about the windows disk repair, but worried about damaging grub and the opensuse partition. Its no loss to me if its too risky to try a repair, but since it is not booting, I thought of giving it a shot. Has anyone done such a repair on a dual boot hard drive?

If Linux and Windows are both installed in UEFI mode, just let Windows do a typical M$ bootloader repair. It won't affect Grub in any way other than changing the default registered in the UEFI BIOS, which you can change right back via BIOS setup, or by running efibootmgr from Linux, or by updating the bootloader in YaST.

If using the old-fashioned MBR/BIOS boot method, you can still let Windows do it its way without trepidation, but restoring Grub takes a bit more work. Windows will restore its own boot code to the MBR. If that's where you keep Grub, which all distros do by default, then it will need to be reinstalled after Windows is all done. I never have Grub on any MBR, so for me, it's trivial to revert M$ boot repair consequences.

Whilst all the above may be true, take a backup first - to an external medium.
M$oft have been known to trash systems/partitions. More so if you happen to select to restore the system to (factory) default.