Upgrading PostgreSQL under Windows

Hi Team,

We are Upgrading PostgreSQL under Windows from v9.3 to 9.5. Following steps from https://www.postgresql.org/docs/10/pgupgrade.html

We are using PostgreSQL database for confluence application.

While running Step 9 , there is command to set path with postgres user. As per installation of postgres database , we haven't created "postgres" user on windows.
When we ran pg_upgrade.exe we are getting below error

[cid:image001(dot)png(at)01D4E4A4(dot)91358400]

Can you please suggest how we can resolve this issue ?

Thanks and Regards
-----------------
Kumar Prince
SAP Competency Centre
NCS Pte. Ltd. (A member of the SingTel Group)
5 Ang Mo Kio Street 62, NCS Hub, Singapore 569141 | Reg.No.198101793G
T +65.6556 6950 | M +65.87133211| E kumar(dot)prince(at)ncs(dot)com(dot)sg | W www.ncs.com.sg