My portable blu Ray suddenly couldn't recognize a

It may be the encoder that is going faulty in the unit i had the same problem with my dvd player after using different regional discs in them.

It does not have a Blu-Ray player, or that's what the specs say. You have a OPTICAL DRIVE*DVD-SuperMulti drive (+/-R double layer) Found here:http://us.toshiba.com/computers/laptops/satellite/L740/L745-S4210/

your burner isnt a burner its a super multi blue combo burns up to dvd

Try a different disc, one that worked before if problem still persists try and buy a lens cleaning disc that should solve your problem. If not, your optical laser head needs replacing.

hp4 gb driwer.can i instal then

did you mean your DVD disc can not play in some dvd players,if so then my answer to your querry would be that some dvd players have more powerful lens to read bulky data in a disc that some machines can not read. also note that some machines are very sensitive such that they do not play discs with viruses,with scratches or any other defects. this is to safeguard the lens from being damaged due to the same though some machines will play barely all discs no matter the scratches.

Use DVD cleaner to clean the lence, it is dirty. Thank you for using Fixya.

Unless the drive in your laptop is a blu-ray drive, it won't recognize a blu-ray disc. A blu-ray drive can recognize and play a regular DVD, but it doesn't work the other way around.

If your computer is indeed fitted with a blu-ray drive, the laser lens may need cleaning. On a laptop, you usually have clear access to the lens with the tray open, so you can try cleaning it with a cotton swab moistened with lens cleaner. Or the disc itself may have a problem. Try another disc and see if the trouble continues.

If the computer doesn't have a blu-ray drive and you will frequently want to play blu-ray discs, get a USB external blu-ray drive. It's easier to find one of those than to locate a suitable blu-ray replacement drive for a laptop. There are many variations of drives used in laptops, but an external drive will always be compatible. And you'll be able to use it with other computers not blu-ray equipped.

Thry to clean laser lens DO that very carefull