hi my other PC is having problems booting up, after the bios scans the hardware it then comes up with a screen with this written on it;

Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt

Last Known Good Configuration (your most recent settings that worked)

Start Windows Normally

Use the up and down arrow keys to move the highlight to your choice.
Seconds until Windows starts: 30

However no matter which option i choose my PC starts to load normally but suddenly a blue screen comes up with the message

A problem has been detected and windows has been shut down to prevent damage to your computer.
UNMOUNTABLE_BOOT_VOLUME

lower down it also says "if problems continue disable or remove any newly installed hardware or software. disable bios memory options such as caching or shadowing. If you need to use safe mode to remove or disable components, restart your computer press F8
to select Advanced Start Up options , and then select safe mode

Technical information:
***STOP:0X000000ED (0X870c5900,0Xc000009c,0X00000000,0X00000000)

i haven't installed any new hardware, or software, and it won't let me past the blue screen to delete anything.

can someone please help

Hi Connanda, and welcome to PCHF,

According to the microsoft help database > Error Message when you restart your computer or upgrade to Windows XP: "STOP 0x000000ED UNMOUNTABLE_BOOT_VOLUME" it sounds like your OS has become corrupted somehow (That is, as you say you havent made any hardware changes)

1.Start your computer by using the Windows startup disks, or with the Windows installation disk if your computer can start from the CD drive.
2.When the Welcome to Setup screen appears, press R to select the repair option.
3.If you have a dual-boot or multiple-boot computer, select the Windows installation that you want to access from the Recovery Console.
4.Type the administrator password when you are prompted to do this.

Note If no administrator password exists, press ENTER.

5.At the command prompt, on the drive where Windows is installed, type chkdsk /r, and then press ENTER.
6.At the command prompt, type exit, and then press ENTER to restart your computer. If this procedure does not work, repeat it and use the fixboot command in step 5 instead of the chkdsk /r command.

Have a good thorough read of the microsoft article.

D