My desktop keep saying "not responding" on many windows. It is very slow. Is there a solution ?

[Sue8805]

Mu computer keeps saying not responding

[WAWood]

@Sue8805 

This issue is often due to a failing drive.

So, let's check that first, because if it is failing, it would need to be replaced and there is no point then in doing anything else until we confirm that.

If your PC is new enough to support UEFI, you can use these steps to test the HDD (Hard Disk Drive): http://support.hp.com/us-en/document/c00439024

If not, to check the HDD you have to follow these steps:
1) Press Esc key repeatedly, several times a second, while rebooting the laptop. Do NOT hold the key down, just press it over and over.
2) Eventually, you will see an HP Startup Menu
3) Press the Function key for testing the hard drive (usually F2) and let it run.

If the drive checks out OK, then report that and I can provide you options for reinstalling Windows on your PC.

Please note that if your model has an SSD instead of an HDD, these diagnostics might not work properly.

[AndyStuart87]

There are chances that your drive is failing, if it is giving any of the below indications or warning signs:

1. Drive is undetectable or unrecognized.
2. System fails to boot.
3. Drive begins to make strange noise.
4. System gets heated soon.
5. BIOS unable to detect the drive.
6. Files or folders become invisible or corrupt.
7. Slowing down of the system.

Further, I suggest you to check out the below blog that explains all the measures to check the health of any hard disk:

https://www.stellarinfo.com/blog/how-to-check-hard-disk-health/

Hope it will help!!