Installing Oracle Express Edition 11gR2 64bit under Windows7 professional 64bit german
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my Hardware:
Lenovo Thinkpad T430
16GB RAM
Toshiba SSD TR200

install Windows 7 pro 64bit german
install all drivers
Firewall and Defender are active

install 7zip 19.00
install notepadd++ 7.9.2
install grepwin
download sysinternalssuite  and unzip SysinternalsSuite.zip

I used sysinternalssuite (autoruns64, procexp64 and tcpview) to identify paths and registry-keys.

networking
network is dhcp, 'file and printer sharing' is active
ipv4 and ipv6 is active
network is public

download from oracle website  Oracle Database 11gR2 Express Edition for Windows x64
and unzip OracleXE112_Win64.zip

This is free, only a account must be created.

unzip OracleXE112_Win64.zip

The local user MUST be member of the administrators group, what is the default.
If your are a domain user, create a local group DBA and  add the local user before installing.

start setup.exe for installation

give password for SYS, SYSTEM

Read the documentation by Oracle!

Use the community portal for questions

I used sysinternalssuite (autoruns64, procexp64 and tcpview) to identify paths and registry-keys.

local directories and files are stored in:
C:\oraclexe

reviewing after installation:
SYSTEM path is modified:
added is C:\oraclexe\app\oracle\product\11.2.0\server\bin;;

Environment ist set via registry ( HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE and subkeys ):

[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\KEY_XE]
NLS_LANG=GERMAN_GERMANY.WE8MSWIN1252
OLEDB=C:\oraclexe\app\oracle\product\11.2.0\server\oledb\mesg
ORA_XE_AUTOSTART=TRUE
ORA_XE_SHUTDOWN=TRUE
ORA_XE_SHUTDOWN_TIMEOUT=90
ORA_XE_SHUTDOWNTYPE=IMMEDIATE
ORACLE_BASE=C:\oraclexe\app\oracle
ORACLE_HOME=Coraclexe\app\oracle\product\11.2.0\server
ORACLE_HOME_KEY=SOFTWARE\ORACLE\KEY_XE
ORACLE_HOME_NAME=XE
ORACLE_SID=XE
ORAMTS_CP_TRACE_DIR=C:\oraclexe\app\oracle\product\11.2.0\server\oramts\trace
ORAMTS_CP_TRACE_LEVEL=0
StatementCacheSize=0
StmtCacheSize=0
VERSION=11.2


the following groups with users are created:
ORA_DBA                                               user: local user

this database comes with:
1 control-file
2 redolog-files, 50M each
processes 100
NOARCHIVLOG
sample schema HR

installation with dhcp is possible, a fixed ip-adress
without gateway and route is faster.
 
if ipv6 and ipv4 is active, ipv6 is used with port 1521
if ipv6 is disabled network is used on ipv4 with port 1521
 
pfile and spfile are stored in $ORACLE_HOME/dbs

beware of the tablespaces in Oracle XE11 32bit:
sysaux tablespace   points to   C:\ORACLEXE\APP\ORACLE\ORADATA\XE\UNDOTBS1.DBF
undo tablespace      points to  C:\ORACLEXE\APP\ORACLE\ORADATA\XE\SYSAUX.DBF

This is well known by oracle in corrected in then 64bit version.