Hello, I'm hoping you can help? I can't boot into my Windows Bootcamp partition. I am running Mavericks and Windows 7 Home Premium. All applicable service packs have been installed. I have a mid 2012 rMBP. I haven't been mucking around with my boot partitions. The last time I checked I booted into Windows fine, came to do it today and no show. When I hold down the Option key on restart OSX does not show me a Windows partition to boot from. I have a little menubar utility called Bootchamp which does a one time boot of Windows, when I click this I get this error message on restart:- 'No bootable device', insert boot disk or some such. In OSX I can see my Bootcamp partition and data. In Repair Utility under OSX I can see the partitioned Bootcamp. Under the Recovery partition I can see Bootcamp and run Repair disk on my whole disk. It just wont boot. I have spent some time searching the internet and I think I have a hosed Windows 7 MBR. Based on what other people have said in other threads I have downloaded gdisk and refit but I dont understand how to use either. Being a Macbook I dont have a CD drive so cant use the Windows Repair utility off my disk (but reading other posts I dont think I even should). What do I do to get this working? Thanks.