Looks like you lost your CD driver. Go to the website of your PC manufacturer and download the Optical drive driver for your system.

Well, some call it optical drive, others call it CD/DVD drive, Vista calls it DVD/CD-ROM drive. But the driver should be on the Acer site. If you post your PC model number, we'll help you find it.

Hmm, I looked at the Acer website. They have a lot of drivers for your PC, but not a single DVD/CD driver. Check what make/model your DVD/CD-ROM is. Maybe we can find something at the manufacturers sit.

Feather, your system might still have the driver on it. Go to Device Manager, right click on the DVD drive and select "uninstall". Then restart your system. When Vista comes back up, it should show you a "new hardware found" wizard. If it finds the drivers, you should be back in business. If it doesn't find the drivers, you still need to hunt them up.

Tried that Scott.Message was Device Driver software was not successful Device failed. HL DT ST DVD RAM GSA T20N ATA ???

Feather, what do you see in Device Manager now for the DVD drive? If you see the device or an "unknown" where it should be, see if you can right-click on it and select Properties. I want to see if there is an error message there that could lead us to a solution.

I checked at Acer Europe for your system and there are no DVD drivers there. This suggests that the drivers that are built-in to Vista will handle the DVD drive. Do you have Service Pack 1 (SP1) for Vista? Did you do any updates recently?

I found 2 additional pieces of information:
1. The problem seems to occur in conjunction with SP1.
2. The Optical reader on your system is an LG reader.

Feather, the CD that comes bundled with your digital camera, and many other computer peripherals, tends to install a lot of different software whether you need it or not. It certainly looks as if it installed something that conflicts with drivers for the CD/DVD drive. It may have been some CD/DVD interface software, such as an ASPI driver, that just confuses the system. Can you determine what software was installed by the disc that came with the camera? We might be able to determine which one is the culprit and remove it.

Otherwise, I'm going to advise you to uninstall that camera software. A software bundle that undermines the basic functionality of your system -- by disabling the built-in CD/DVD drive -- is software that cannot be trusted. It may be causing other problems that you just haven't run into yet. I checked on Werlisa's website for updated software -- nada. Once again, they are no help. Even if you can't use the software from the disc, we can get your videos to play back with the XviD software that I mentioned in the previous thread.

Feather, my advice is not to install anymore software from that CD unless you find that you need it. If you can transfer pictures and images from the camera, playback the videos, and your CD/DVD drive still works then you have reached a good stopping point.

The software that is typically bundled with consumer electronics devices is usually a trial version or a version with reduced function. Should you need any tools similar to the ones on that CD, you can download them. There are free trial versions available on the Web and freeware programs that have similar function. You know that you can ask here if you need a recommendation.