Another one? I get the feeling we have an epidemic or something
Don't bother reinstalling. That won't change anything.
Find your electrum folder and delete the files named 'config' and 'blockchain_headers'. Location of the folder:
https://en.bitcoin.it/wiki/Electrum#Wallet_FileSee if electrum runs now. If it doesn't then you'll have to restore from seed. The way to do that is to rename the electrum folder to something else and run electrum. Select restore from seed and go from there.
Also before asking any more questions tell us your electrum version and operating system.