Some softsynths are slow to load at first attempt.

Wondering if anyone can shed any light on a weird problem I'm having in Sonar Platinum.
 
Whenever I start Sonar from a reboot, some softsynths- but not all - are exceptionally slow to instantiate - up to 30 seconds in some instances, causing the computer to state that Sonar is "Not Responding" in some cases. The weird thing is that this happens for the initial load of the VST only. Once the first instance of the synth is loaded, the next instance of the same softsynth appears instantly. I've noticed it with softsynths like Addictive Drums, Z3TA+ 2, Rapture Session and Arturia's Jupiter 8V.
 
Also, if I add a synth and then close Sonar (not saving project) and then re-open Sonar subsequent loads of the synth(s) are instant also.
 
I thought it was a problem with Jupiter 8V at first, and raised the issue with Arturia, but the other VSTs I mention above act in the same way, so I'm perplexed at what is happening. Some VSTs like Session Drummer for example load very quickly, even when using track templates with kits pre-loaded.
 
I'm not running into any CPU usage issues according to the meter in Sonar, and my hard drive (albeit "only" a 5400 rpm laptop drive) is 75% empty. I'm not witnessing any excessive disk activity either, although projects with any of the above mentioned synths in them also take a long time to load, even if they're only 8 track scratch projects including the soft synths.
 
It's not something that's been an issue for me until recently. Has anyone else had a problem like this and more importantly, is there anything I can do about it? Please, no smart remarks about getting a beefier computer, the machine I have at the moment is the best I can afford and despite the VST and project loading speeds, I can run everything with no difficulty, once it actually loads the VSTs I want to use.
 
Yours hopefully,
Gary.

+1 to what SilkTone said.

Just want to let u out know that I am experiencing the same (Add.Drums)

Gary walker,did you do a lot of tweaking to your system ? (Switch off services,stop indexing etc.)

Do those plugins load as fast in Reaper after a boot? It is also possible (just speculating) that Reaper and SONAR load plugins in a deferent way, as in SONAR will freeze until all plugins completed loading, while Reaper might load plugins in the background so it looks like it is ready sooner (applications do weird things to make them look more "snappy". SONAR for instance doesn't close right away when you close it. However the UI closes instantly making it look like it closed right away, however take a look at Task Manager to see how long it still hangs around after a close).
 
The fact that you said it loads fast on subsequent loads in SONAR is proof to me that the issue is really with the slow 5400 RPM drive. Laptop drives are notoriously slow. I initially had my samples on what was supposed to be a fast magnetic drive on a desktop computer. I can only imagine that it would be painfully slow on a 5400 RPM laptop drive.
 
I know you said you are on a tight budget, but I've seen 120 GB SSDs on Amazon for less than $40, and 64GB for around $23. That is really going to be the only way to solve your problem if you want to keep using the same laptop.