Timeline lagging when editing/viewing

Thanks for getting back to me Ashley. This thread is similar to the issue I have. I had it on both my computers and experienced it in both SL1&2. The movie I have was a screen recording done with SL1, so this should output to the timeline fine, should... I actually think the real issue is with the effects. The processor goes through the roof when it gets to zoom effects and I think it just snowballs from there. The more I try to adjust the effects, the worse it seems to get. Being an instructional video, I am using a lot of the zoom feature. The more there are, the worse the problem seems to get. I have the issue, but not as bad, in shorter videos with less of these effects used. When playing, the timeline almost looks as though it is in slow motion at times. It jumps through the time in the timeline too, rather than seemlessly playing through and the slide reflecting what the playhead is actually playing.

I spoke to the sale rep in Australia from Microway, Simon. In discussion he mentioned it might be graphics related and my card might need the drivers upddated. I have done this with no change. I expect though it may still be processor/graphics related, even though the machines both have at least the minimum specs or above. I don't want to have to spend more money on a new machine or upgrading the laptop, is was a drama just getting the laptop in the first place, but I guess the software just won't do what I want or need it to do effectively without the machine have high end specs? I'll have to edit it in other software and bring it back at the moment, I've lost so much time on something that should take be less than 30 secs to do. I'll explore the hardware issue further.

Thanks, any immediate result would be great, even if it's user error...