Today I installed Ubuntu and since then i cannot boot into Windows anymore. I used the "standard" option (didnt change any partitions manually, just entered the size) but used the UEFI-mode.
At first the GRUB entries for Windows did not work at all, after reading this thead i was able to add a new Grub entry - now i can get into the "windows-loading" screen for a few seconds but then i always see some kind of bluescreen for a fraction of a second and the laptop reboots.
I can get into the windows recovery partition but the only option there is to reset everything to factory settings (+erase all data). I have no idea how to get into the Windows 7 repair mode which was mentioned here (tried everything else in this thread too - no success).
My boot info can be found here: http://paste.ubuntu.com/1411573/
I have no idea what went wrong (there is even an extra page for the Zenbook Prime where no installation problems are mentioned).
I would appreciate any help/ideas, many thanks!
After further investigation and GRUB optimization (without final success) i think that the problem is most likely a corrupted Windows partition (or just the start sector? I CAN see/mount the windows partition from ubuntu).
Ubuntu works perfectly and Windows gets to the "Loading" screen (with the fixed GRUB entries) but crashes instantly afterwards (there is a bluescreen for a fraction of a second, afterwards the laptop reboots).
I tried several Windows recovery tools (Windows 7 Recovery disk etc.) but i cant get anything to load nor fix the problem - apparently Win7 recovery tools still have big problems with UEFI.
Does anyone have an idea how to fix or investigate a corrupted windows partition from Linux? As described i can see/edit the partition from ubuntu.
For my Windows partition (/dev/sda3) GParted shows me a size of 86.2GB (with 72.36 used and 13.84 unused) while the mounted drive shows a size of 92.6 GB with 77.7 used and 14.9 unsused - could that be a reason for the corruption? Any idea how to fix this from Ubuntu (still couldnt get any Windows recovery tools to start from an USB stick..:)?
The problem was in fact a corrupted start sector in Windows. After trying around for hours and manually creating an EFI-enabled Win7 USB stick (repair disk did NOT work, full disk was needed!) i was able to fix the bootsector.
Many thanks for your help!