computer identifier does not match

I bought SOLIDWORKS Student Edition 2025 in January this year, downloaded it and used it fine, but once my 30 day trail ran out and I tried to activate the product it wouldn't work and said that my computer identifier does not match? I have uninstalled and re downloaded and tried again but I cant do anything to get it to work. Please help. 

 

This come up when I try open solidworks, (I click ok).

I then select activate solidworks and click next

This come up so i click yes

I have tried all these options, none work.

So if i click cancel this comes up and thats the end