Windows 7: the boot selection failed because a required device is inaccessible

Hy there... I was on my tour to Cyprus and last night I came back I saw my PC uptime was 22days. I asked my brother wht's going on , he told me if you'll shut down pc, i'll not get it stared. Due to some reasons I restarted my pc and now its giving me this error. "the boot selection failed because a required device is inaccessible". I've 2 drives 500GB + 1000GB, windows is on 500GB drive which I check through BiOS & shows SATA Port 0 = (0.0GB), SATA Port 1 WDC WD10EARS-0 (1000.2GB). Please guide.

Hello there. I was searching over the internet and found this:
Windows 7 won't boot up: "The boot selection failed because a required device is inaccessible"

The thread is marked as solved,so the user has solved that problem. Give a look it.

Thanks for ur instant reply but this thread is not useful

Assuming your motherboard has more than just two SATA connectors, how about trying removing the 500GB drive cable from "Port 0" and reconnecting it to say SATA Port 3" (or just some other available SATA connector on the motherboard)?

It might be the SATA port 0 connector on the motherboard that is flaky.

Note that by moving the drive to another SATA connector, you might get some rumblings from Windows 7 at first boot after that, talking about "new hardware detected" and requesting a re-boot after the drivers get installed. Really, not much is going on here but if it does you should reboot. Everything should be back to normal after that second reboot.

Anyway, hopefully this use of another SATA connector might solve your problem.

You might also try removing the SATA cable from the drive, and then re-seating it again. Sometimes that's all it takes.

Hopefully, your 500GB drive hasn't actually died.

Thanks for such a detailed reply. I tried almost all motherboard SATA ports but no luck....

I think my HDD is dead. Tomorrow gonna buy new one. This time 5,400RPM even for Windows partition.

Ironically, right in the middle of doing something today my own "symptom" returned, yet again!

This is literally the complete "death" of a functioning Windows 7, and it's caused by the sudden loss of access to the C-drive.

Of course I've been fighting this for several months now, but none of the usual methods to coax it back to life would work. I tried everything I'd suggested to you, and none worked this time... though I'd been lucky with them in the past.

I tried using standalone boot CD's to see if I could explore that drive, but it just seemed to be non-responsive. Or, I could see the root-level folder structure but if I tried to get deeper than that it would just hang.

So, as one more extreme step this time I actually replaced the SATA cable with a brand new one. Well, that didn't make any difference. In fact, I now once again lost my drive's recognition completely in the BIOS! Gone (again)!

So once again, I removed the connector which was now sitting on SATA port 2 on the motherboard (having been moved last week from SATA port 4), and re-connected it to SATA port 3!

Well, this time that produced success! Once again the BIOS saw the drive, and Windows 7 was able to boot from it (though as I mentioned, new drivers will get installed on that first boot from the new SATA port which require one more restart) and I was finally back in business.

Time to run some current backups... just in case I lose it for good.

So, you're not alone.