I have Ubuntu and Windows 7 dual-boot system on my laptop.
When I bought it I immediately created recovery discs. Then I repartitioned and installed Ubuntu.
Now my Windows is running slowly and I suspect some malware is running there even though I'm not sure. So I would like to return my Windows installation to factory defaults WITHOUT erasing Ubuntu.
I'm pretty sure that I would have to reinstall Grub but this is not a big problem.
Is it possible to do just that? Restore Windows without touching other partitions on a Toshiba R830?