tried the Dell live image 3.0.iso, burnt it on a DVD, press F12 to boot from dvd, choose DOS based Service tag utility option.  DOS>CLS.  DOS>C: DOS>cd util DOS>asset /s new service tag I got an error: this machine does not support an asset/service tag. solution: actually I spent all this time not knowing it would be that simple.  just navigate to the red box of service tag in bios, and enter, it lets me type in a new service tag, enter again, it got saved, and it is no longer editable.
Need tool to delete red box in Studio XPS 8100 BIOS service tag field. Currently there is a solid red rectangle filling the service tag field. I prefer to have it blank instead of solid red box. Not sure how it got there in the first place?
Studio XPS 8100, BIOS service tag red box