Several members seem to have problems with their CD/DVD drives at the moment. As far as I know, there is no magic solution but you could try some or all of the following: -
1. See if there is an updated driver or updated firmware for your drive at Vaio-Link. Some Sony drives are re-badged from other manufacturers and you may have to search for updated downloads. For example, if you have a Sony DW-D56A drive, you can get a firmware download from HERE (Use PFS2). Many other drives are also supported on this site.
2. Use System Restore to return your Vaio to the configuration when it was last working normally.
Start -> All Programs -> Accessories -> System Tools -> System Restore - choose a restore date before you had the problem.
3. Look in Device Manager to see if there are any errors against your DVD/CD-ROM drive.
Start -> Right-Click My Computer -> Properties -> Hardware -> Device Manager - expand DVD/CD-ROM Drives and check the status. If there is an Error Code or a yellow triangle with a ! or ? come back here with the number and we may be able to help.
4. If there is no error and the drive is reported as working normally, try Uninstalling the drive by right-clicking on it in Device Manager and choosing Uninstall. Re-booting your Vaio will reinstall the drivers.
5. Try some different software to read/write your discs and see if that works. Also try a different brand of discs - Sony, TDK and Verbatim seem favourites.
6. Try a liquid lens cleaner on the lens and polish with a microfibre cloth ? this can sometimes help.
7. If your drive works with either CDs or DVDs only make sure the ribbon cable is not preventing the reader head from moving freely - check that the laser head in the drive can move freely for the whole range of its travel. The disc information is held on the outside tracks for DVDs and the inner tracks for CDs.
8. Last resort is to perform a full C:\ Drive System Recovery from your Recovery Discs. Make sure you back up all your Data as the contents of C:\ will be lost and your Vaio returned to the factory configuration.
If none of these work, you may have a hardware problem and you need to contact Vaio-Link. There is no point contacting them until you have carried out a Drive C:\ Recovery as this is the first thing they will ask you to do.