How do I download an elicense for Acrobat 8 Professional?

[T1OEM]

I have re-installed Acrobat 8.0 successfully on my computer following a WINDOWS upgrade that previously had been working for years without any problems.  Every time I open Acrobat I'm being prompted to download an e-license.  But when I try to download it, it tells me it can't connect to the internet ("The server could not be contacted to download a license."), even though I can browse the internet quite normally.  I have the serial number and have read a number of forum suggestions. Without any luck. In layman terms how do I sort out this frustrating issue?

Can't Download Acrobat Pro 8.0 E-License​

[kglad · Accepted solution]

after securing your serial number, uninstall acrobat 8 (using the uninstaller)

clean per Download Adobe Reader and Acrobat Cleaner Tool - Adobe Labs

remove the cache.db file from Program Files (x86)/Common Files/Adobe/Adobe PCD/cache/

restart your computer

follow the steps here to install acrobat 8, https://helpx.adobe.com/creative-suite/kb/activation-fails-cs3-acrobat-8.html

if that fails read this, https://forums.adobe.com/thread/2385900