that is what i though, but i tried many different combinations for password, and at least 1 of them should satisfy policy requirements. also my windows user password, which is accepted by OS and thus satisfies the requirements resulted in same message
i did try to see what policy is active, but i am using win 7 Home Premium and i could find a way for this version to see/change policies. the only thing i found is by running "net accounts" from command prompt. which shows the following:
and those are very simple password policy which all combinations i used satisfy
Could you please try to reset the "postgres" user password in window7 before reinstalling the PostgreSQL. Below link gives more information of reseting password in windows7