my windows wallet made a new address after syncing.

No coin loss but why this happened?
It is possible that despite the fact that the wallet has created an address, the balance of the wallet is still saved. Similar to how it works in SegWit wallets.
The wallet is not SegWit, right? Sorry I am a newbie, I know it does not matter much if it is Segwit or not, but as an Investor I want to know.