Sony Vegas?

Hey i always watch the awesome video mixes that people put up on YouTube of their favourite Bollywood/telly-wood couples and I LOVE THEM! now I asked some people what software do they use and most said that they used windows movie maker, Sony Vegas or after effects now I have Sony Vegas and windows movie maker and they are extremely useful software's great for video editing if you want me to give you a link to get Sony Vegas do tell me (full version!),you can get awesome sparkles and textures your videos look so cool just like professionals!.. problem 1: problem I always get is the videos lag now if you get this problem i found out a good solution if you go to -->Options--->Preferences--->Video tab---> change RAM Preview from 319 or whatever you got to 0! and change maximum number of rendering thread to 2 or 1 now that should help this is not to s[speed up rendering but to stop lagging when you add motion blur or any effects also if you go to task manager (CTRL-ALT-Del) then go to vegas on processes and change the prioty to high that speeds up the proces! Problem 2: Do you sometimes get red clips and black preiveiw screen this could be either becuse your file is to big or your computer is messing with you! what you could do here is go to your video clip that has gone red not on sony vegas but the file the video is in and just rename the video(something simple so if clip 0024 give it a letter like clip0024a) go back to sony vegas and now make sure you remember the name you changed it to and search for the file when sony vegas tells you that the file is missing because you just renamed it! and that should solve it if this doesnt work you can also go back to preferences and go on general and uncheck close media files when not active application and restart sonyvegas! hoped these tips came in handy,please comment and check out the ads!.