Unable to deactivate Photoshop CS4

[c pc54500499]

I have a PC set up as dual boot on Windows 7 and Windows 10.   I have Photoshop CS4 and Lightroom on W7 and want to transfer it to W10.  I have tried to deactivate Photoshop CS4 so that I can re-install in on the W10 system but I get a message stating that this could not be done because there was no internet connection.  I have run through all the checks on the relevant help page of the Adobe website, which confirm that I do have a connection to the website.  How can i get Photoshop to deactivate?  (I can't reinstal CS4 on the W10 partition as it is already installed on another PC.)

[kglad]

if you purchased from or registered with adobe, go to your account page (using the same adobe id you used to purchase/register) and deactivate there, https://account.adobe.com > plans > my plans.

[c pc54500499]

Sorry, I can't see any option to deactivate despite both my Adobe products (Lightroom and CS4) showing as registered.

[kglad]

using a browser that allows popups and cookies, contact adobe support during pst business hours by clicking here, https://helpx.adobe.com/contact.html and request "an activation count reset".

click contact us (= cryptic icon in the lower right)

in the chat field, type AGENT
be patient, it can take quite a while to reach a human

[Peru Bob]

Go to Adobe Customer Service and only ask to have your activations reset:
https://helpx.adobe.com/contact.html?step=STAM_downloading-installing-setting-up_serial-numbers-rede...

You may also be able to contact Adobe by phone:
https://helpx.adobe.com/contact/phone.html

[kglad]

if you request an activation reset, ps cs4 will be deactivated on both computers.