20 gigs of free space is getting kind of tight for version 8. It leaves a huge footprint, and I've had problems if I let my free C drive space get below 30 gig and/or fragment.
That said, there are many factors that can affect how your video plays. You don't say what operating system you're using or how fast your processor is, but that makes a difference.
It also makes a difference what kind of camcorder your video is coming from.
Meantime, a couple of suggestions for optimizing your system:
1) Turn off background rendering and the auto analyzer, per the FAQs to the right of this forum
2) While you're in Edit/Preferences/General, set Timeline Scrollling to Page rather than Smooth Scrolling.
3) Have a look at my suggestions for optimizing your version 8 experience, also from the ever-helpful FAQs.
Thanks for this, will check the FAQ now first, sry .
I use Videos that I compressed with XVid, can this slow down Premiere Elemtns too, or does this has no effect? Machine is PC, Quadcore, don't ask me about CPU speed though . Anyway, off to read FAQ now.
Sorry but Premiere Elements definitely can not work with Xvid (or Divx for that matter) video.
The video should ideally be saved in the DV-AVI format.
The fact that your video is Xvid could definitely account for the problems you're experiencing.
As Steve says, Xvid (and its commercial cousin, DivX) are not editable formats. They are delivery-only formats for heavily-compressed, delivery-only formats. Even with proper conversion, the quality has already taken a major hit, due to the Xvid compression. Conversion will get you editing more smoothly, but if you can go back to before the Xvid compression, the quality will be much better. If your camera shoots with the Xvid compression, you are stuck with that quality, and there's nothing that can be done about it. The camera mfgr. made decisions that their customers would not want to edit, but just show, or upload to YouTube. I find this unfortunate, but many mfgrs. are making that same decision.
Good luck, and with conversion to DV-AVI Type II w/ 48KHz 16-bit PCM/WAV Audio, your editing experience will be greatly improved.
Also, I agree with Steve on freeing up more HDD space. I'd think about picking up an external HDD to store older Assets, etc.