Step by step upgrade guide

Hi, I am new to the notes administration. And now my new company wants to upgrade the Domino server from 8.5.2 FP2 to 8.5.3. Does anyone have any step by step upgrade guide? Are there anything that I need to take note of? Thanks a ton!

Subject: Step by Step instructions

Follow the instructions inthelink below and you should be able to complete the upgrade without any issues…http://www-10.lotus.com/ldd/dominowiki.nsf/dx/Page_2_Deploying_Domino_85x_servers

After clicking on setup.exe, if the install does not proceed, change the user temp/tmp variables to “c:\windows\temp”) Steps: Right click on My Computer|Properties|Advanced|Enviroment Variables