Office 2010 - User gets an installation window each time they open an Office 2010 application for the first time

Symptom

User who has office 2003 and Office 2010 installed may get an installation window each time they open an Office 2010 application for the first time

Resolution

• Click Start > Run
• Copy and paste the following command:
• reg add HKCU\Software\Microsoft\Office\14.0\Word\Options /v NoReReg /t REG_DWORD /d 1
• Hit enter, you will not see anything happen unfortunately
• Launch one of the affected Office 2010 applications to check that the issue is resolved
• If the problem persists - open regedit and browse to HKCU\Software\Microsoft\Office\14.0\Word\Options
• Check the NoReReg value is set to 1