Tried that unfortunately and still the same issue! Also no idea on previous build but I know im on build 452 now.

Before you try a reinstall, close VP and made sure it's completely shut down, using task manager.

delete the contents of C:\Users\[you]\AppData\Local\VEGAS Pro\17.0

the first time VP is started, startup will be slow.

Shut VP down again, using TM make sure it's gone.

Start it up again. I do these last two because I've run into render problems on the first startup after a folder cleaning. Doesn't happen if I shut down and restart again.

Nope still the same thing! I have also tried reinstalling and again, the same thing! I don't know what to do!

Ask Support

I have the exact same issue! I just updated the software a few minutes ago and it crashes every time I drag and drop or import files. The update might be for something because I used Vegas earlier today and it worked normally

I would uninstall completely; then reinstall a fresh copy.

https://www.magix.com/us/support/my-service-center/

Maybe problems with new Windows 10 update?

I have the same issue with build 452. When I try to import media in the Project Media panel, there is always a crash. Another problem is that many existing projects will not load and Vegas crashes. So this new build is unusable. I've gone back to build 421. Now I have to live with that annoying message when 421 opens that there's a major update, even though I unchecked that notify option.

For my problem with build 452, I disabled the option "Enable So4 compound reader for AVC/M2TS." When that is enabled, Vegas crashes when any of my .mp4 files are being read.

I didn't need to do that with build 421.

I have the same issue with build 452. When I try to import media in the Project Media panel, there is always a crash. Another problem is that many existing projects will not load and Vegas crashes. So this new build is unusable. I've gone back to build 421. Now I have to live with that annoying message when 421 opens that there's a major update, even though I unchecked that notify option.

I think about doing the same thing until there is a solution for that build 452

@craftedmotion I don't think you saw my second post:

For my problem with build 452, I disabled the option "Enable So4 compound reader for AVC/M2TS." When that is enabled, Vegas crashes when any of my .mp4 files are being read.

I didn't need to do that with build 421.

For my problem with build 452, I disabled the option "Enable So4 compound reader for AVC/M2TS." When that is enabled, Vegas crashes when any of my .mp4 files are being read.

I didn't need to do that with build 421.

Where is this option? I have looked and looked. Is it only in File I/O for certain operating systems.

@Crowyote  ... For the So4 switch, click on Options and then, while pressing down Shift, click on Preferences. In the tabs at the top of the Preferences window that opens, you should see a new tab called Internal. Click on Internal and, in the field at the very bottom of the Internal window, type in So4 - the list should then filter down to 4 items. Change the Value for the 2nd item (Enable So4 compound reader for AVC/M2TS) from TRUE to FALSE, then hit OK. Et voila!

@Crowyote  ... For the So4 switch, click on Options and then, while pressing down Shift, click on Preferences. In the tabs at the top of the Preferences window that opens, you should see a new tab called Internal. Click on Internal and, in the field at the very bottom of the Internal window, type in So4 - the list should then filter down to 4 items. Change the Value for the 2nd item (Enable So4 compound reader for AVC/M2TS) from TRUE to FALSE, then hit OK. Et voila!

Life saver! Immediately fixed my problem!!! Thanks!