Query the Windows registry through batch syntax - windows

Question

I'm trying to query a particular registry folder (or whatever you want to call it) to obtain some information.
Particularly the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall folder contains a list of installed software.
The issue is that each software is identified through a random key value like {0001B4FD-9EA3-4D90-A79E-FD14BA3AB01D} instead of the actual software (like Skype).
This makes it hard to find the Skype identifier because I need to loop through everything inside this Uninstall folder and check whether the DisplayName value corresponds to Skype (or whatever other application name).
I need to use batch syntax... this is what I have so far but it doesn't behave the same on different computers, maybe I get different variables assigned based on some erroneous formatting of the reg output? I don't know. Can I use a data structure to contain whatever reg outputs? Anything would work.
#echo off
for /f "tokens=*" %%a in ('reg query HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall') do (
for /f "tokens=2,* delims= " %%b in ('reg query %%a /v Publisher') do (
IF "%%c" == "Skype Technologies S.A." (
for /f "tokens=2,* delims= " %%d in ('reg query %%a /v UninstallString') do (
echo %%e
)
)
)
)
Is there a cleaner and safer way to achieve this in batch?

Answer 1

It seems me more easy to use
reg QUERY HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall /f "Skype Technologies S.A." /s
as a basis for your batch file. It produces a simple output like following
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{D103C4BA-F905-437A-8049-DB24763BBE36}
Publisher REG_SZ Skype Technologies S.A.
End of search: 1 match(es) found.

Answer 2

This batch loop through items under the Uninstall key and search for the defined software name e.g. Skype. Once it located the software and the full key, it will then use it to search and print out DisplayName and UninstallString as shown in Output below.
Note:
For some software e.g. Skype, Notepad++ the key may not contain a GUID e.g. {BEB5FB69-4080-466F-96C4-F15DF271718B}. This batch is able to find software with or without a GUID
It can return multiple software if the name is too short
Use %x86GUID% variable to search 32 bit software and %x64GUID% for 64 bit software
.
#echo off
setlocal ENABLEDELAYEDEXPANSION
set SoftwareName=Skype
set x86GUID=HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall
set x64GUID=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
REM It's faster to first locate the software GUID, then search it's Name, Version & UninstallString
for /f "delims=" %%P in ('reg query "%x86GUID%" /s /f "%SoftwareName%" 2^>nul ^| findstr "Uninstall\\%SoftwareName% Uninstall\\{"') do (
echo %%P
for /f "tokens=2*" %%A in ('reg query "%%P" /v "DisplayName" 2^>nul ^|findstr "DisplayName"') do echo Found: %%B
for /f "tokens=2*" %%A in ('reg query "%%P" /v "UninstallString" 2^>nul ^|findstr "UninstallString"') do echo %%B
)
endlocal
Output
Key: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Skype_is1
DisplayName: Skype version 8.64
UninstallString: "C:\Program Files (x86)\Microsoft\Skype for Desktop\unins000.exe"