Strange and serious problem

Per my answer above, I  thought it was hardware. Your memory test, which you aborted, was probably stuck somewhere...

Well reinstalling Premiere pro didn't work for long. After 1 day problems returned with some additional issues...

But then I remembered something very important about my pc I changed.

I added new RAM memory to my existing memory sticks, but due to the age of my parts I obviously couldn't find the same sticks.

So I added different memory sticks and to be honest I had no problems with games and Premiere pro. Until about after 1 month or so.

Anyway I removed my old RAM sticks and Premiere pro has been working fine so far.

So I am 95% sure this has been fixed now.

Thank you all for assisting.

@chantalharvey  Thanks for the suggestions, I will take note should I encounter more problems.

@Ann Bens  I know my pc is old, but Premiere pro has been working fine for a few years. That's what makes it so frustrating getting these issues iut of the blue.

But it seems after deleting and reinstalling Premiere pro is working normally again. I was able to edit a large project without fail and rendering also completed in a reasonable time.

So hopefully this problem is now fixed.

Unfortunately I have no idea what caused it in the first place...

Your machine is somewhat underpowered.

5th generation cpu and running off HDD instead of SSD.

Premiere Pro system requirements for Windows

Might want to consider proxies.

Same problem here - shame on adobe for letting these serious bugs excist. Its hard to import files, takes hours. Then, the files in project show as pending for hours! Then, they wont play on the timeline ...

Anyway, i fixed it by going back TWO versions.

Before doing that, these are some options to try: (didnt work for me):

For the pending images, you can try to hitting ctrl+a to highlight everything on the time line, then right click and find "disable" then, right click again and find "enable" that's usually a quick fix to that glitch.

If that doesn't work, try creating a new sequence and then copying your timeline files and then pasting them in the new sequence, because the problem can be your sequence and not the files. If that doesn't work, go to the top of premiere, select Edit > Preferences > media cache and select "delete unused files". If none of those work, let me know.

Because your next step can be either moving your files to a diff harddrive, or deleting your file previews.

Another work around is changing the file name. so if your video is called sadpuppy.avi you can change it to sadpuppy.mts and trick adobe into pulling it in.

After 5,5 hours the memory test didn't even complete testing 1 ram stick. Since I have 4 sticks I quit the test, whatever it did check was without errors.

So I deleted Premiere pro and reinstalled it. I have been able to render 2 videos in 2,5 hours, so I think the issue has been resolved.

Unfortunately I have no idea what could have been the problem...

To make sure everything is working again I will start a new project soon with lots of editing.

Will post here to confirm if the issue has been resolved.

The disk check was all good, all drives are working properly. Win 10 is running on a ssd, recordings and projects are on a hdd due to the file sizes.

Mem test is still going, this will take approx. 6 hours.

I think the hardware will be fine tbh, I had this problem 2 or 3 years ago with Vegas Pro as well. No crashes like I have now, but rendering started to take a lot longer without reason, that is why a friend recommended to try Premiere pro.

Once my pc is done with the memory test and finds no errors I will just delete Premiere pro and reinstall it. See if that works.

Reading your post again, I'm wondering if it is hardware? It's not typical that a software bug would cause this:

<<After that my pc won't start anymore (stuck at post) or it takes a very long time to boot.

To get back into Windows I have to turn off my pc and disconnect the power for several minutes...>>

If you suspect at all your hardware, you should probably run some tests. MemTest: https://www.memtest86.com/

Also your hard-drives

https://www.google.com/search?q=hard+drive+test

If you can afford a new SSD, you can put that in place with a clean install of Windows 11 and go from there.

Well unfortunately it didn't help. The rendering took very long, after 3 hours it was on 84% and when it hit 91% PP froze along with my entire pc.

No error message.

Hopefully there is more I can try.

Alright I did what you said, just to be sure I also ticked the option about resetting plug ins (not that I have any).

I don't want to speak too soon, but I was able to edit a small portion of the project I was working on without problems. It is now rendering.

Tomorrow morning I will start a new project with lots of editing which will be a good test.

If the solution really was this simple I'll smack myself on the back of my head and give you a big virtual hug. 

I will report back tomorrow.