My video picture and audio are not synchronous. What is the problem and how to fix it?

I am making a couple copies of my DVDs to give to my friend as a grad present. I was wondering how to make the copies using a windows computer. I still want mine to work and have a copy if that makes a difference.

Hi, I upgraded my iTunes to latest version last night, and when I played music by iTunes, it makes a low noise sound, while I can play these music files with other players perfectly. What should I do?

I have no experience on Blu ray files and disk yet. I haven't bought a single movie in blu ray.
So I would like to ask, do I need a special media player to play blu ray movies downloaded from the internet? How about from a blu ray disk inserted into the disk drive?

I want to burn a CD for playing in my car... Do I need a Data CD or mp3 CD?

I would like to host some tutorial videos about electrical work and have them air on TV. I'm an electrician and the videos will be about how to replace switches, outlets or even how to wire a modern kitchen. This may be a tough recording process in some case.
Is there a feasible way to record the whole process that indeed helps the audience?

I want a converter program to convert video to gif easily. Windows movie maker helps me get video clips, but I need a good gif converter without watermark inserted. Help? I have tried a lot, either give low quality or come with watermarks.

I want to put video on to my computer from my video camera, which is Sony. The video is on cassette, I have software to transfer it, but it doesn't work. And it keeps asking me to download macromedia flash player, and after I do nothing happens. Anyone have experience with this?

I just attempted to purchase your product online but it hangs up at the very end.  Can you assist me in completing the purchase or can you find my in process purchase and assist in completing it?

I downloaded all the episodes of Bluestone 42 from BBC iPlayer and I want to put them onto my 4th Gen iPod touch but I can't find any decent video file converters. Anyone know any?