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Last Updated On March 20, 2018
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So I have a few problems, first of all, is that my pc sometimes “Crashes” while doing very light tasks, all tho it works great when rendering HD video. Basically when I’m watching a youtube video or something my pc just fully freezes (no inputs work ctrl+alt+del doesnt work, if i  plug someting in there is no sound, if i pres the button it doesn’t do anything, so I just press and hold the button to cut off the system and then turn it back on.

I cannot install linux to my computer, I have made a fully working bootable zorinOS drive it works on all the computers i tested it on, except for the hp z400 workstation. When i boot from usb it starts to boot, but before the installer windows shows up the pc shows random   colours, the last time i tried it it showed half random colors and half of my windows 10 desktop, like waaaat?! and it is just frozen like that. my BIOS is from 2010, but i cannot update it, my pc is win 10 64 bit, so when i go to the driver  site it doesnt have the choice for win 10, and I even downloaded the hp support assistant, it can detect my pc and connect to hp servers, but it doesn’t get any messages or update please help.!

solution: z400 is somewhat old so i’d start with the hardware.

 Perfoming a periodic cleanup by getting rid on any fluff and rubbish inside the case is always a good thing.

Take as much of the hardware out of the case as is possible and be aware of static electricity.

 Then i’d remove the old thermal paste from the CPU/heatsink junction as it can dry out and become less effective.

Place fresh quality themal paste on the CPU and reinstall the heatsink.

Also consider replacing the thermal paste on the chipset (if the mobo chipset has a heatsink and fan – i think z400 does).

 Ensure you have remove or disconnect everythin leaving just one RAM stick, CPU & it’s heatsink, fans and keyboard installed.

 Find the latest BIOS binary file which is usually contained in the DOS directory within the latest HP service pack.

For z400 i believe the latest version is “sp75723.exe”.

You can use 7-zip to look inside the service pack exe and extract just the binary file to the root of the smallest USB memory stick you have.

Also, the bios_flash.html file within the service pack explains the process.

Basically, insert your USB stick containing the BIOS binary file into the front USB port.

With USB memory stick inserted, power up the system and jump into BIOS.

From within BIOS it should be obvious how to update BIOS using the binary file on the usb stick via “FLASH SYSTEM ROM”.

 Let it do the firmware update and hopefully it works.

That should then be one issue out of the way.

 NOTE: if you have an old BIOS, you may NOT BE ABLE TO jump  directly to the latest BIOS.

So read the release notes associated with the BIOS service packs.

 As an example, with z420 BIOS,  v1.xx BIOS needs to be updated to the latest v1.22 BIOS prior to updating to v2.55 BIOS.

Later updates to v3.90 results in being unable to roll back to earlier v3 versions!

ALSO with some BIOS updates, you may need BIOS rest to default settings for all updates to occur correctly.

 As such it’s best to read all the release notes for all BIOS versions to get a clear understanding of issues.

I haven’t read z400 IOS release notes but as a minimum, you may need to stage v1, then v2, then v3 updates.

But you read and confirm…

Sadly HP seems to have made it more difficult to find older BIOS releases…

 Anyway, if you still can’t update BIOS within BIOS itself, with staging the updates, then you may have bigger issues.

Don’t discount virus’s, intermittant hardware faults or odd software issues.

 But it’s always best to start with the basics, clean up the case, update BIOS and build from that foundation…

 [edited to clarify BIOS version example was with references to z420 as i had that service pack on hand] .