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I have an assembled computer. It runs on Windows 7 Ultimate. I exactly don't know what happened but when I switch it on , it says that "the file checksum does not match the computed checksum".

So I thought of installing Ubuntu in it.But it is not happening. I burned the Ubuntu downloaded files on a DVD RW.

I set it to boot using the disc but it said "Reboot and select proper boot device or insert boot media in selected boot device and press a key". I did what I can, but I am unable to boot it.

I need a little help ASAP.

david6
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GB Boxer
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1 Answers1

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There are two separate problems here:

  • Does the DVD now contain a bootable Ubuntu installer. (check how you created the DVD). You need a bootloader from somewhere.
  • How can you select the DVD drive, to boot from. (see below)

You need to get the PC to select the correct boot source (your DVD drive).

Best method is MANUAL, not setting boot order.

You need to select whatever key (often Esc, or F10) to see BIOS menu. Then select 'manually select boot device' (or similar).

If you identify the exact motherboard, BIOS, etc. someone can probably tell you exact steps.

Then follow steps as suggested by @Registered User.

david6
  • 14,499