Password

I try to install numerous versions of postgresql on my windows xp 
platform. And I have a problem during instalation installer ask me about 
the password I have no idea what to do. How I can check if on my 
computer is saved ealier password which I do not remember? Or what I 
should type to run instalation? I try various of passwords and there is 
one problem (The password was incorrect. Please write correct password 
for posgres windows user account).


Than you in advance!

Tom

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