I have a emerson EWR10D5 dvd recorder and it just started putting disk error every time i load a dvd.

SOURCE: Emerson DVD Recorder EWR20V

The problem is likely that you are using 8x/2x media. Though the booklet does not say it, the burner does not support anything above 4x for DVD-R and 1x for DVD-RW. Calling their tech support can (possibly) get an update for this problem. Otherwise, the burner cannot use anything but outdated media.

SOURCE: DVD Recorder Does Not Record

It took about 45 minutes, without a manual. Carefully disconnecting all cables and marking them so the would go back in the right place later. Carefully Disassembling the unit, removing the cover - 6 screws, noting all screws and where they came from, pulling the front panel using the plastic tabs, removing the top front edge cover - two screws, removing the disk assembly - 4 screws, pulling the two thin leads so I could pull the entire assembly out. Removing the back plastic cover from the DVD assembly and identifying the Optical Disc Lense. Spraying some LENSE CLEANER on the same cloth that I clean my glasses with, and carefully wiping across - gentle stroke in same direction, then opposite direction - a few times. Spray lense cleaner on the cloth not on the lense. Reassemble. Reverse order of above. Works great now. BEST OF LUCK....Or you can find almost any DVD repair facility. This is not a unique process. Robert

SOURCE: Emerson EWR20V4 that wont record DVD's

Sure, My suggestion is to call 1-800-605-8453, They will be glad to help you with that error code!
Good luck

SOURCE: Recording Error "Can not record on this disk/E4 54037380

I had that exact same problem. I would record a bunch of dvds with no problems for months and then some and one day it doesn't work. Only this showed up E4 EA03738B. However I've found the solution. Instead of going out and returning the recorder or buying new dvds just purchase a Laser Lense Cleaner. It's a dvd cleaner. Works like a charm.

SOURCE: Samsung DVDR 120 SYS ERROR

You have an early unit and need to install the firmware upgrade. Download it from Samsung and burn to a CD. Insert the CD in the DVD player and the upgrade will be performed.