If you have ever used Electrum before, when you uninstalled it, it will NOT have deleted the wallet file. This is a security measure to prevent accidental removal of your wallet file if the application is accidentally uninstalled.
What this means is that if you install Electrum at a later date, it will automatically find your old wallet and use that. Additionally, older wallets didn't encrypt the wallet file (only the keys inside the wallet file), so they don't prompt for a password when you first attempt to open the file... They only require a password when sending or wanting to see the seed or use private keys for signing messages etc.
Do you remember using Electrum previously? If so, any chance you can remember what your password might have been? Or possibly remember writing down a 12 word seed and have that stored somewhere?
If not, getting access to those coins will be very problematic
You may have to resort to trying to crack the password with btcrecover (
https://github.com/gurnec/btcrecover)