Occasionally (about 5% of the time) if I download a video clip (VideoBlocks) to Firefox (99) to the Download folder and then drag it into Premiere Pro's Timeline, the system will freeze. After a while the cursor disappears. Windows does not seem to come back and I have to do a hard reset of the PC. After the reset, I repeat the editing steps and it works. I may have observed that trying to drag the video immediately after opening up Windows File Explorer may make the problem more frequent. So, after opening up Explorer, I wait several seconds and then try to drag the video into the timeline; but, it still hangs once in a while.
A similar hanging problem happens when I drag an audio clip that was created in Window's Voice Recorder.
I've had this issue for at least a month. There have been times when Windows recovers on its own after a very long wait. However, I find that I have to restart Premiere Pro, Photoshop and Media Encoder to get them back to normal.
A different type of problems with the Voice Recorder file is that it sometimes appears to drag in the proper audio file, but the file shows up with essentially a blank audio recording. This bogus audio file is also a different length than the one recorded, leading me to suspect that the program is confused about which file it should have dragged into the timeline. Once this happens, I have to carefully delete the bogus files in Explorer, clear them from Premiere Pro, and restart the Voice Recorder. This seems to get me back on track and I can re-record the audio and drag it into the timeline properly.