Solved Problem after rendering

I've just edited my first video and have rendered it, but now bits of the video freeze but the audio carries on. What's with this and how do I solve it?

Hi liv4luv

I need to know as much about your project as possible, otherwise it is impossible to give any proper help.

Which exact program and version are you using ?
What type of video is in your project ? Where did it come from ?
Video camera, screen capture, Go Pro, 1080p, 1080p at 60fps,.......?

Have you watched any of my tutorials yet ?

I can't say much more until I get some basic information back from you.

Regards
Derek.

Don't worry it's sorted now. I originally played it in WIndows media player but then downloaded Quicktime and it worked fine.