A service I used some years ago is shutting down. I withdrew some coin but it went to an old address. I believe it was my old electrum wallet that I only have the seed for. How to recover my bitcoin?
First download Electrum, try to get a version closest to the one you were using. Get the portable version because you may need to get a higher version if it doesn't work.
Open the program, File -> new/restore -> enter in your seed when asked.
When it asks for a password, it means a new password to save this wallet with encryption.
Then wait for the syncing to happen.