Comptuer crashed, had 2nd install of CS5, couldn't boot so couldn't deactivate... what to do?

My w10 machine refused to boot, tried everything I could find, nothing worked except replacing the system files, the original windows and program installations and settings were saved in windows.old. It had my 2nd install of CS5 on it, so it was impossible to deactivate it. I have the serial number, I registered it with Adobe back when I bought it and it still shows in the account. 

Is it possible to ask Adobe to deactivate a copy and let me reinstall it on the same computer? I tried using the AI chat agent which imo is quite stupid, and was informed I had to pay to speak to a human. Is that the case?