There's a good chance the issue involves your source videos or photos that you are using.
Provide some details on content (Video/photo) being used.
Where did they come from and how were they imported in PE (Camera used and file format, (mpg, mts, avi, mov. etc.)).
Also the resolution size of still images (like 600x800, 1000x700, etc.)...
Please give us more info on your system's I/O, i.e. the number of HDD's, their size, speed, controller type and how they are utilized. The more detail the better.
Next, tell us about your Windows Virtual Memory, how it's managed and where it's located.
Last, please give details on both your Project settings and then in great detail, all about all of your Assets.
When one has a problem with a program, like PrE, the issues usually sort out like this, and in this order:
1.) System (every aspect, other software and all sub-systems)
This is aimed a Premiere Pro, but may help
First, work through all of the steps here http://ppro.wikia.com/wiki/Troubleshooting
If your problem isn't fixed after you follow all of the steps, report back with the DETAILS asked for in the questions at the end of that link
I don't think that I have posted this LINK in this thread yet, but if so, I apologize.
This is how I prepare for an NLE session on all of my computers.
I also recommend the link that John furnishes to the PrPro-Wiki.
Many thanks indeed to all, I'll go through all the suggestions and let you know if I could fix it!!
In the meanwhile here's some more details:
The files that I'm mostly using come from my SANYO Xacti HD2000 and are MPEG4 and are AVC1 H.264/MPEG-4 AVC (Gspot report).
mp42: MP4 v2 [ISO 14496-14]
- avc1: MP4 Base w/ AVC ext [ISO 14496-12:2005]
mp4a: MPEG-4 AAC LC
There are also some jpg's but very few and the software works quite well & fast on them evan on preview.
I have two SATA 500GB HD's, all the files and PE8 are on the same one.
Graphics Card Manufacturer Powered by ATI
Graphics Chipset ATI Radeon HD 4800 Series
Device ID 9442
Subsystem ID 026A
Subsystem Vendor ID 1043
Graphics Bus Capability PCI Express 2.0
Maximum Bus Setting PCI Express 2.0 x16
BIOS Version 011.003.000.000
BIOS Part Number 113-AB65505-121
BIOS Date 2008/08/06
Memory Size 1919 MB
Memory Type HyperMemory
Core Clock in MHz 625 MHz
Memory Clock in MHz 1004 MHz