Cleaning and removing C:/ drive slows down the opening of Libre Calc

If not the right place, please direct.
I deleted, cleaned, and moved to open up space on the Windows 10 20H2 C:/ drive. Then I uninstalled an older LibreOffice and installed 7.2.2.2 It now requires nearly 30 seconds to open Libre Calc. So far other documents open normally.
I want to use Calc and Microsoft Word. I don’t want to use Writer or Microsoft Excel.
I get the “default file formats not registered” error.
Default files are registered .ods with Libre Office and docx at Microsoft Word, but that does not help.
I will greatly appreciate advice. Thank you.

Thank you Gurus. 7.2.0.4 did not work. I'll proceed with the scans.

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Please ignore the image, the wrong image attached and I am not able to remove it.

No joy so far. Neither sfc, dism or chkdsk helped.

I then installed the 3^rd version of LibreOfice but no change.
After clicking any Calc it takes 37 seconds before opening properly.

LibreWriter, Word and everything else open normally.

If I just live with it or install a previous image, I’ll still have to free up space on the C drive and I am likely to screw it up again.

I haven’t been to the Libre forums yet because the problem seems it has to be in Windows since it occurred immediately after I freed up space.

Thank you. I appreciate the help.

I use OpenOffice Calc. Windows 10 21H2

6 sec first opening of Calc, < 1 sec for subsequent openings. That is on a Laptop type 5400 rpm HDD.

That leads to some "cleaner"/"Speedup" application deleting Prefetch/Super Prefetch files. Slowing up first and probably subsequent openings of Calc.

If you have an application of that sort either uninstall it or configure it.

I would also look at your system mod of an old style Start menu.
You can always put this stuff back, but for testing purposes there maybe some conflict.

Windows itself regenerates these Prefetch/Super Prefetch files, so they do not need to be messed around with. They are specifically there to speed up the starting of applications, useful on a mechanical HDD.

This is basically an addition to that in post #3.

Gentlemen: I have some time problems and using the knowledge above I'm going to workaround my Issue slowly. From you gentlemen I've experienced the fastest and most germane assistance I have ever received.
A very sincere thank you.