Windows boots into a drive different from BIOS (CMOS battery)?

[thezeronumber]

I have a HDD, a OCZ SSD that I used to boot the OS from and an Samsung SSD which I currently use for Windows 7 (it has been working like this for a few months). A couple of days ago I had problems loading Blizzard's Battle Net client and as per their instructions I did a 'selective startup' using System Configuration; this fixed the problem and I changed it back to 'normal startup'.

Today I've started the computer and the resolution is tiny, the time is wrong and some items appear missing. I looked at Disk Management and somehow the OCZ SSD is now the C: drive that Windows 7 and everything else loads from. I went into the BIOS but priority and boot order show the Samsung SSD. I also manually booted into the Samsung SSD but nothing changed and it still loaded from the OCZ one.

I imagine the resolution and missing items bit is because it's loading everything from a different drive but is the timer problem due to a dead CMOS battery and could this cause the boot issue described? Or is there something else going on?

 

[FloppyPoppy]

No if a CMOS battery was dead the pc would not boot at all as it powers the bios.

And surely the SSD should have been the c drive anyway? A low resolution sounds more like missing gpu drivers.

More importantly though i am not sure at all why blizz would want you to change it to selective mode seems to be the main problem, a big issue with doing that is once you turn it on it often won't be able to turn off again as when you put it back to normal mode and apply it the next time you check it will have reverted to selective mode again. I imagine this has caused items to " go missing " because selective mode will be stopping them from booting including the GPU drivers. Having looked at this blizz seem to be getting a lot of grief for this recommendation as it really is counter intuitive.

Honestly would not know how to solve this however. Make sure it's not gone back to selective mode first .

 

[thezeronumber]

A few months ago I stopped using Windows 7 on the OCZ SSD and re-installed it on the Samsung one: The C drive has always been an SSD but they've somehow swapped places.

Everything was working fine during 'selective startup' (the C drive was still Samsung SSD, the drivers were working and nothing was missing), the problems began when I changed it back to 'normal startup' (the C drive is now OCZ SSD and Disk Managment shows that it boots from OCZ SSD even though BIOS shows Samsung SSD). The resolution is due to a lack of drivers as NVIDIA GeForce Experience is installed on the Samsung SSD along with most other things.

It was stupid on my part to blindly follow their instructions but I didn't think much of it as it was coming from a well-known site/company and thousands of people must have done the same thing before me.