It appears that everything is working now after installing Creator 5X update (ecdc_v18.104.22.168_basic_enu.exe). I believe what has happend causing my problems is that I was not able to install this ecdc_v22.214.171.124_basic_enu.exe, till you advised me to use RoxiZap to remove all the files after uninstalling. This ecdc_v126.96.36.199_basic_enu.exe is apparently needed to allow formatting of DVD+R/W.
Thanks Skybird for your assistance.
Precision Tower 5810, Quadcore Intel Xeon E5-1630 v3, 3700 MHzRAM:16 GB PC6400 DDR4 SDRAM 1066MHzHDD: 2x ATA ST500DM002-1BD14 500GB SATA non RAIDDVD:HL-DT-ST DVD+-RW GTA0N SCSI and PLDS DVD+-RW DH-16AES SCSIVideo: nVIDIA Quadro K4200 PCIe 4GBAudio: Recon3D PCIe, Altec Lansing ADA995 5.1 speakersMonitor: Dell E2011H
7.1 pro sp1 64 bit