Question CSM settings not saving in BIOS

[tbutt234]

Hi,

I have had my PC for over a year, just this week I installed a new CPU fan and ever since I have been unable to boot my PC. It opens to the BIOS where my drives show up but in the boot sequence it shows nothing. I tried reinstalling windows but it wont let me choose any drives in the installing page due to my drives having MBR partitions and windows can only download on GPT format. This led me to trying to enable my CSM support and change it from Legacy to UEFI and every time I save and exit my BIOS the change becomes undone and the CSM support disables automatically. Please if you have any ideas to how I can fix this? This is causing alot of problems for my work and I would like to get it solved before next week starts as I have alot of worked saved on this computer.

 

[Colif]

tried replacing the CMOS battery? It is what stores the BIOS settings, so it might just have died. Cheap fix.

obviously unplug pc when you do it.

I tried reinstalling windows but it wont let me choose any drives in the installing page due to my drives having MBR partitions and windows can only download on GPT format.

there is an easy fix to that. If Microsoft spoke English there it would help. All you need to do is wipe all partitions off the drive and it will let you continue installation - but if your files are on that drive, its not a simple answer

you can do this to copy any info off C you can't lose:
Boot from the installer

• on screen after languages, choose repair this pc, not install.
• choose troubleshoot
• choose advanced
• choose command prompt
• type notepad and press enter
• in notepad, select file>open
• Use file explorer to copy any files you need to save to USB or another hdd

 

[tbutt234]

tried replacing the CMOS battery? It is what stores the BIOS settings, so it might just have died. Cheap fix.

I cleared the CMOS, using the two pins on my motherboard, that did not change anything. I will try replacing the battery once I get a new one and see if it makes a difference!