Hi Laura Herman, I'm sorry, but Acrobat 8 is quite an old version and Adobe no more provides support for this version. As your computer has crashed, you might not be able to deactivate the software from the same. With a single user license, you can activate Acrobat on maximum two machines. Please check if there is any other machine on which you have installed Acrobat so that it can be activated and then installed on the desired machine. Regards, Anubha
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