Windows 10: Inaccessible HDD's in a new Win 10 PC build, also has major slow down and performance issues

I recently built a new PC for my parents after their old one stop working. No idea how the old one broke, but it was covered in dust so I assumed it was from overheating/bad airflow, and that their old HDD should be fine to at least recover their old data in the new computer.For the new build, I went with a 256 GB Kingston A400 M.2 SSD and a 1 TB Seagate Barracuda, but also installed it with the old 500 GB HDD.I had no hardware issues when I did a test boot to bios and continued to install Windows from there.Once at the desktop, I saw that the main SDD with Windows installed Drive C: was fin

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Updates slowing computer performance

Hi,

Listed below are possible causes why Windows is running slow:

• Too many application installed.
• Virus and malware.
• Corrupted system files.
• Outdated drivers.

For us to assist you with the concern, we suggest following the steps on this
article.

Update us with the outcome so we can provide further assistance.

 

unlock hdd

Hi Johan,

It is possible that your
HDD was unreadable
causing the error message to appear. We recommend that you perform these troubleshooting steps and check if there are any changes:

• 
  Shutdown
  your
  PC.
  
• 
  Unhooked
  the
  HDD
  and
  turn on
  your
  PC.
  
• 
  Reconnect
  your
  HDD
  and
  restart
  your
  PC.
  

If the issue persists, we suggest that you contact your
laptop/computer's manufacturer
for further assistance.

Update us on how it goes.

Regards.

 

Slow System Performance on Windows 10 PC

Hi,

Thank you for writing to Microsoft Community Forums.

I understand that your PC is running slow. We appreciate your efforts in providing us the detailed information.

• Which updates were installed?
  

To check which updates were installed recently go to
Settings > Update & Security >
Windows update > View installed update history

Meanwhile, you may want to try the following troubleshooting steps mentioned below:

Method 1:


I suggest you run the Performance Tune Up Check and
check if it helps.

Method 2:

If the issue persist, I suggest you refer and follow the suggestions from the article on how to
Improve PC Performance.

Note:
Modifying BIOS/ complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the configuring of BIOS/CMOS
settings can be solved. Modifications of the settings are at your own risk.

Note: Resetting the computer to factory setting will remove all hard drive data and reinstall the original operating system. I suggest you all you backup
important files and data before performing a factory reset.

Additional Information:

Tips to improve PC performance in Windows 10


https://support.microsoft.com/en-us/help/4002019/windows-10-improve-pc-performance

For issues playing YouTube Videos:

I suggest you refer and follow the suggestion on how to
Troubleshoot problems playing videos - YouTube Help.

Hope it helps.

Regards,

Zaki