Can't Burn CDs

Am running Windows XP Pro with Windows Media 11. The Dell Dimension 8400
computer is working fine except for one thing. When I try to burn a CD I get
a message "Media Player encountered a problem while burning file to disc."
Slowing speed as suggested doesn't help. I also get error 80040155. I have
checked the devices, including the CD-Rom, it is fine. I can play CDs and I
can Rip CDs to my hard disk. This problem popped up about two weeks ago when
I removed Media Creator from the computer. Have tried "Restore" to different
dates without success. Have tried several other fixes without success. The
Burn screen seems to recognize my CD-Rom drive, but when I hit burn, I get
the error message. Have not gone to regedit yet-next step. Would certainly
appreciate some help after all the diagnosing I have done unsuccessfully.

http://support.dell.com/support/edoc.../U70350LRs.pdf

See the Sonic support website at support.sonic.com for additional
information.

NOTE: If you have a DVD/CD-RW combo drive and you experience recording
problems, check for
available software patches at the Sonic support website at
support.sonic.com.