DVD/Blu-Ray drive won't load disk after being burned.

DVD/Blu-Ray drive won't load disk after being burned.
An internal DVD/Blu-Ray drive, that I've used for years, now won't load a DVD disk that I've just burned.
When I load a blank DVD or Blu-Ray disk, it 'spins up' like normal, and am successfully able to burn to it. But after closing the burner drawer, the DVD disk won't 'spin up', and when I click on the drive in Windows Explorer, a box pops up with 'Insert a disc Please insert a disc into Drive D: Help me choose a disc'.
I am able to load a prior Blu-Ray disc that I've burned, but not any of my burned DVD disks.
It seems that, somehow, the DVD functionality has been 'turned off'.
Anyone know what's causing this, and how to fix it?
Thanks!

You may need to clean the lens.

How to Clean CD/DVD Laser Lens in Computer - YouTube
How to Clean DVD Drive Laser Lens in Computer | PHILIPS DVD Lens Cleaner SVC2520/10 - YouTube

Thanks for the fast reply. I should have mentioned that in my original post...yes, I have a 'lens-cleaner' disk, and have used it multiple times.
To be clearer in what's going on:
Blank CD's and Blu-Ray disks will load fine, and be able to be burned and played.
Previously burned and commercial CD's and Blu-Rays disks are able to be played
Blank DVD's won't 'spin up', and previously burned and commercial DVD's won't play.
So, while my drive recognizes CD's and Blu-Ray disks, it no longer will recognize DVD disks.
It seems like a software 'switch' has been 'turned off' somehow.

- - - Updated - - -

I recently read in another tech forum to check the 'Use AutoPlay for all media and devices' checkbox(at the top of the attached screen print).I tried that, blank DVD's will still 'spin up', and burn. But those, and all prior burned and commercial DVD's won't load. Looks like the only difference was that whenever a disc was loaded, a box came up asking what software I wanted to use to play the files(which did not happen before). So, I unchecked it and went back to the way it was before.Attached is a screen print of Control Panel-Autoplay...is it possible that one(or more) of these selections has somehow got changed from what they used to be?Oh, forgot to mention that I use(and have been for many years) my 'Nero StartSmart Essentials'(there's no 'Help' button, so I can't see what version it is).

If you inset a data DVD can you see the files on explorer?
If you can see the files can you execute or ply them by double click?
Did you load any extra codecs?

For DVD's(burned and commercial), nothing appears in Explorer, and a box pops up with 'Insert a disc Please insert a disc into Drive D: Help me choose a disc'. The problem is only with DVD's...CD's and Blu-Ray discs load, burn, and are able to be played like before.

If you insert a Win 7 installation DVD (or any other OS installation DVD) can you boot from it?
If you can't it isn't a Windows issue but a DVD hardware issue.

Questions:

Did you recently update the firmware for your optical drive?

Did some optical media software like Nero change the region setting? (Not sure if that's even possible software side).

To rule out Nero or some other optical media software, boot in safe mode and then try exploring a DVD. You might also want to temp remove Nero and any other optical media software using RevoUninstaller. Or, boot a live environment with Hiren's Boot CD or Linux (be very careful not to install) using USB and launch a DVD. That'll rule out he hardware and bring software to the forefront as the likely corrupt.

Latest news:
I did a hard reboot...
I am still able to burn and view CD's and Blu-Ray discs, either my own data or commercial discs.
Blank DVD's still 'spin up', and are able to be burned 'successfully', but will not load after burning.
All my prior burned DVD's which used to load, are now not loading.
Commercial DVD's will load and play OK.
I was able to burn and then load/play DVD's when using the 'multidisc' option(which I normally don't use).
I've been using blank DVD+R discs for many years without issues... could it be that my burner's settings have been changed to not accept the DVD+R disc using the non-multidisc option(but then why do DVD's burn successfully)?
Any suggestions as to what to try?

How do I stop this 'how do you want to use this disk' msg box from popping up everytime I burn a DVD? In the past, this box did NOT pop up, it just started recently, and ONLY for DVD's(there is no pop up msg box for CD's and Blu-Ray blank discs.

Run regedit.exe and go here-

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

Is there any reference in the Names to upper or lower filters? Maybe you could provide a screenshot?[/COLOR]