Did you re-install from the mfg drive i.e. "reinstall to factory default" or something like that?
Most brand named systems use a BIOS based boot to partition for the factory Windows install files with drivers and apps. To enable the install partition to launch they either make a custom BIOS or custom master boot record or master partition table, both or all three since BIOS customization extensions can be made from the boot sector with most machines.
Over time it has proven disastrous for security software to utilize this method across platforms.
If your partitioning software changed the custom master boot record or boot sector, the BIOS wouldn't like it.
If you didn't do anything after the reinstall and it just went fiiith, I'd say you caught a bad cold or a drive sector dropped out which would result in the same if the BIOS is expecting a key code added via the boot sector.
The story: I ran out of storage on my Windows partition so i decided to move 30GB from my Data partition to my Windows partition using a " separate program". It said it need to reboot because the partition is being used and after the restart my PC booted straight into the BIOS. The Boot category is empty.
The problem: I tried changing all kinds of settings in the bios but no result. So i decided to install a fresh copy of windows. So i did without any problems. The windows installation went perfect (all my partitions were detected. I even made a new bigger partition for windows). Setup said it's all done and rebooted. But after that it went back straight to the BIOS and HDD was not a boot option again (HDD was not detected, only the USB..). I ran the windows setup again and the changes i made are still there. (New partitions and a fresh installed Windows)
Please help! :??: