HDD gets inacessible on Windows shutdown

Windows is functional, i.e. it can be loaded. (Windows 7) However, after shutting computer down, if I try to switch it on again, I get the error message with status 0xc000000e, info "The boot selection failed because a required device is inaccessible." This error persists through multiple reboots.

To successfully launch computer again I have to enter bios settings and exit them. Even if no changes to parameters are made, the windows now boots ok. "no keyboard" error message from bios seems to allow the launch too. (If you pull the keyboard wire out.)

Last software installations were openhardwremonitor-v0.7.1-beta http://openhardwaremonitor.org/ and RealTemp_370 https://www.techpowerup.com/downloads/2089/real-temp-3-70/. I'm a bit worried about the former, as I've tried to use its onstartup functionality. Yet I'm not sure that the problem wasn't present before the installation. Currently both programs are removed. (Their startup options were disabled before removal.)

The motherboard is ASUS P8Z77-m, BIOS version 1206. The HDD is WDC WD10EARX-00N0YB0. Windows is 7 corporate.

I've tried making new boot sector records in system recovery command line. I've tried reverting Windows to earlier state. (Prior to above mentioned installations) (19 September state of critical windows updates.)

What should I do now to get it working normally?

Forget about software you installed within the OS - from what you're describing, you're not even getting that far.

Additional troubleshooting steps:

• Ensure your drive isn't failing (check SMART, check file system structures, check with Western Digital's diagnostics).
• Ensure your PSU isn't failing (test with a known-good replacement).
• Upgrade your BIOS to the latest version (currently version 2105), reset it to defaults, and reconfigure it as needed.
• Replace the BIOS/CMOS battery.