TeamCity build agent disconnected

Question

I installed a build agent on Windows 7 and always have the agent show up as \"disconnected\". The log teamcity-agent.txt shows below information

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Answer 1

Starting the TeamCity Agent manually in the Services panel resolved the issue for me (on a Windows machine).

Problem was indicated in the upgrade.log (in BuildAgent\logs directory):

ERROR - r.agent.upgrade.UpgradeRunBase - Failed to start agent after upgrade: java.io.IOException: Failed to start TeamCity build agent service. Please check TeamCity build agent service user have enough permissions to stop and start the service.