I am a beginner with oracle I just installed it, but after 1 day it's SQL plus window starts showing an error "an initialization or shutdown in progress" I already ran some commands like "database pluggable all open" and "instant startup or shutdown", shown on your site yet not working, so I wanted to reinstall it on my PC but Oracle 11g" not showing in control panel now. Please give me guidelines to either uninstalling it or removing the problem.
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