Thanks Danny and Jeremy. No, I haven’t loaded any codec packs. I was working on an edit in which I had various .mp3 music tracks. Then the next day, when I opened the job, Vegas couldn’t find those files any more. It asked me to replace them – which I did by pointing Vegas back to the original files – but then once the job was opened the mp3s were marked as offline. I subsequently noticed that the render options list had formats missing.
System restore was my first idea, but this is when I found that no restore points had been saved.
And yes, I have DVD Architect loaded – although before this incident the 64 bit version was working happily. It won’t work anymore and I have to use the 32 bit version. (BTW, I’m running 64-bit Windows 7 with l6Gb RAM.)
Also, I’ve loaded the latest version of Quicktime (v7.6.9). I’ve got this version working well with Vegas on a laptop.
Only other thing, if it is relevent, is that the PC had a power problem around this time. The machine crashed periodically. This has been fixed with a new power supply.
Thanks
Charlie.