Note that you do not 'deregister' Adobe products.
#Check my adobe acrobat version serial number
Alternatively, for applications downloaded/installed the serial number will be listed in your 'My Account' under the Adobe ID you used at Adobes web site.
#Check my adobe acrobat version serial numbers
Bobster2 you are going so far good but my still remain how do i know that which version of pdf is readable. Serial numbers are on a label placed on the container holding the OSM (CD or DVD) that has the install. Some software in the family is commercial, and some free of charge. Abobe reader is just that a reader adobe. Looking for a batch file to find out the version of adobe installed where i will provide the hostname or ip address and the script will return the version of adobe installed on that machine.