Who do I talk to about why has my serial number to Acrobat XI Pro been revoked??? I have been succesfully using XI Pro under Win7 for some time now – since around Jan 2014. I just installed Win10 on my laptop and upon using Acrobat, one of the first windows I'm now getting is stating my serial number has been revoked. Now what's the problem? ( A previous, simiar situation occurred when I was using Acrobat X Pro, too.) I'd like to be able to call and TALK with someone from Customer Support ASAP!