If it's like most of the ones i've done, the way i do it is drive a chisel along a flat side of the fitting that's turning. It should jam up between the fitting and the housing of the turbo. That way the fitting will stay put will you turn the line fitting.
There has twice been a link on this site which is an anti virus virus. I have had 3 different "spyware" viruses ,one of which my computer guy is having real problems getting rid of. Of course at home i have a Mac so no problem there, but here at the shop i had to get a pc laptop to do install Vagcom, so i'm now being super careful.