Do you have Nvida graphicscards on your systems? I'm using AMD myself and have no problems though I've heard several people complain about Nvidia's drivers on Windows 10.

I have only smale problems with Timeline Speed the rest 100 % sory but i am Editing in full 4k NIVIDIA

Look at my Editing Computer ( sorry WIN 10 ) Pauls PC
X399 AORUS Extreme/AMD Ryzen2970WX/1xQuatro 4000 Driver:Geforce 419.67Skill V DDR4 64GB/3200MHz/Win10 prox64
Intel SSD 750/400 / Intel SSD 750/1.2Tb 1x4TB SSHD /1xSeagate 10TB pro
1xSamsung UA28D590 4k LUMIX GH5 1xLG HDR

I'm runniing an older nvidia graphics card (GTX260) which appears to be an issue with PD13 according to this forum. No mention on the minimum requirements on the package though. I'll be installing a EVGA GTX960 today but I believe Windows 10 is the issue, again software claims compatibility but is concidered an issue AFTER you purchase it. Kind of like advertising a car having great acceleration then explaining to the buyer AFTER purchase you meant only down hill with a tail wind. I know no software supplier can claim full compatibility across the board but come on this compatability claim with windows 10 is a stretch in my opinion and so are the software's minimum hardware requirements.

Well, it's allways good to check the requierments online too. You'll find them at
http://www.cyberlink.com/products/powerdirector-ultra/spec_en_EU.html?&r=1

Might be that Windows 10 changed things around as those specs say that it should be compatible. Also, I just saw that it has some issues with some of the latest drivers for Nvidia. Let's hope they'll (PD or Nvidia) find a fix for it.

The only problem I have with PowerDirector 13 is not being able to render DV AVI files in Windows 10. Otherwise, I installed it with no problems. And I can render with other videos files just fine.

Installed the EVGA GTX960 last night and it made a huge difference in rendering time. I didn't have alot of time to fully exercise PD13 but I did a quick render of a short 1080P file that was jittery and stuttered during playback before the new video card and results were excellent. Rendering time dropped by 75% and there was no noticable stuttering during playback so I'm optimistic about this upgrade being a solid solution

Glad to hear that!

Hi oldthor,
As soon as I saw you mention the old card 260.... the issue looked really obvious. Then you stated you were upgrading the card...wham you were already going to correct the issue. Good to read the end result. Thank you for posting the follow up.
FYI The 260 if I recall correctly couldn't even use the benefits of DirectX v11 and with DirectX 12 in W10...
Dafydd