How to test RAM and HDD (Hard Drive).

Introduction
HP machines have built-in Bios testers for RAM and HDD's.
To use them you need to enter Bios by pressing F10 on startup. They are placed under ' Diagnostics menu '.
Why I wrote this guide and complicate whole situation?
There are three reasons:
This testers are not so great and sometimes they do not detect problems which you may have with your hardware. It's recommended to use more advanced tester for RAM and manufacter diagnostic programs to test HDD's.
Not always you will be able to enter Bios. Sometimes corrupted hardware is blocking possibility to run it.
Advanced diagnostic softwares for hard drives allow to fix some problems.
Table of Contents:
A How to test RAM with Memtest86+.
B How to test HDD (Hard Drive).
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Ad. A
There are few possibilities to run this program. In this guide I will present how to run it from:
CD
       and
USB Flash Drive.
First we need to burn Memtest86+ on a CD or prepare properly USB Flash drive with a special tool.
Here you will find Memtest86+ home page from which you will be able to download correct version of this software.
Solution 1. CD:
        Download ' Pre-Compiled Bootable ISO (.zip) ' and extract it with 7-Zip(free) or WinRar.
        Download CDBurnerXP from here. Install this program and run it.
        Choose ' Browse ISO image '.
        and point Memtest86+ iso file.
        Click ' Burn disc '.
        Wait until burning process will finish.
        Choose ' OK '.
        Exit from program.
Solution 2. USB Flash Drive:
         Download ' Auto-installer for USB Key (Win 9x/2k/xp/7) ' and extract it with 7-Zip(free) or WinRar.
         Connect USB Flash Drive to one of USB ports. Run ' Memtest86+ 4.10 USB Installer '.
         Click ' I Agree '.
         Select USB Flash Drive and check box to format it.
     Caution!
          Format process will erase all information from USB Flash Drive. If you have there something important then please backup this data first.
           Choose ' Create '.
           Wait until process will finish and click ' Next '.
           Exit from program by choosing ' Finish '.
How to run Memtest86+.
Leave USB Flash drive in USB port or CD in CD/DVD drive. Restart your system and on startup press F9 key repetitively:
After this step you will be able to select from which device you want to boot. Choose from the list ' USB Hard Drive ' if you have prepared USB Flash Drive (like on below photo) or ' Optical Disk Drive ' if you have prepared CD:
How to use Memtest86+ to test RAM?
Do at least 2 - 3 passes. In Errors column may show up only 0. If it's other number then you need to replace corrupted RAM stick.
** Say thanks by clicking the "Thumb up" icon which is on the left. **
** Make it easier for other people to find solutions, by marking my answer with "Accept as Solution" if it solves your issue. **

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