I have this OEM Matshita CD-RW installed into my PC without coming with the software. And my friend gave me a copy of Adaptec 4.0 came with his HP CD-RW. So far, all I get are imcompletely burned CDs. I never have one completed CD burned with this CD-RW. Not sure is the hardware or software or both problem ? I just want one easy step, copy a complete CD or VCD from my D:drive (CD-rom) to my E: drive(CD-RW). It always came up with an error message when it is writing to 99%. I am so frustrated that I can't use my CD-RW at all since I bought it. I would appreciate any help !!! Thanks in advance for any help.