Hi guys, new to using vegas pro so could be me making silly errors.

I have Vegas Pro 15 build 384 and when i try to play and pause preview during edits the system takes time to catch up with what i am doing and just sits there for 2-5 secs before it starts. I also have issues when moving clips around on the time line that it again becomes unresponsive. I also have a issues when watching back clips on the preview that the sound just dies and can take anywhere between 2-10 secs to come back, but i can play that clip again and the sound is fine, close the program open it up again and then the sound sometimes drops out in other areas.

here is my specs.

Operating System
  Platform: Windows 10.0 (64-bit)
  Version: 10.00.17134
  Language: English
  System locale: English
  User locale: English

Processor
  Class: Intel(R) Core(TM) i5-7600K CPU @ 3.80GHz
  Identifier: GenuineIntel
  Number of processors: 4
  MMX available: Yes
  SSE available: Yes
  SSE2 available: Yes
  SSE3 available: Yes
  SSSE3 available: Yes
  SSE4.1 available: Yes
  SSE4.2 available: Yes

Display
  Primary: 1920x1080x32

Memory
  Physical memory: 16,329.7 MB
  Paging memory available: 18,761.7 MB

Help is much appreciated. Thank you.