DH-20A1S Does Not Burn

Hi, I have a Sata Lite-On DH-20A1S DVD-RW running on Vista Ultimate/Home Premium and it can read/write to cd-r/rw’s and dvd-r/rw’s.

But, once I install Nero 7/8 or even daemonTools, the drive can only read cds/dvds but can’t write to it. It won’t even pick up blank media and windows just slows down after that.

So, I uninstall all CD/DVD related applications and it still won’t pick up blank media, it only reads cd/dvds which already have data on it.

Although, reinstalling windows allows the drive to read blank media again, but once I install these CD/DVD programs again, I get this problem again.

Any help?