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I have installed postgreSQL in my pc.

Unfortunately, it doesn't connecting database.

Now, at my reinstalling, the same problem occurs. This can be solved by cleaning registry.

Can I clear it manually ?

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How come did you conclude that the problem will be solved by cleaning (or related to) the registry? – Mehper C. Palavuzlar Jun 24 '10 at 8:11
Let me say this: Have a nice time breaking your machine. – Hello71 Jun 25 '10 at 2:17
up vote 0 down vote accepted

A word of warning: Be very careful with editing the registry! It may turn your Windows installation unusable pretty fast.

Now that this is out of the way:

  1. Open the Windows start menu.

  2. Enter regedit in the search field (Vista/7) or the "run command" field (XP)

  3. Enjoy. You can search the registry (Edit > Search) for strings containing "postgres".

However, I agree to Mehper, that you should first find out what to change exactly before just digging through the registry.

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