I think you have a driver problem, not a hardware problem.
I have the Pioneer BD-RW BDR-205.
The DVD/CD-ROM driver is called cdrom.sys
The folder is correct, but the file name is wrong.
I think you have a nasty file there.
Check the C:\Windows\system32\drivers folder for the cdrom.sys file.
If you have it, then delete the UBHelper.sys file and reboot.
You want the DVD device to show the cdrom.sys driver.
By the way, do you have anti virus software installed?