Can't install or remove Adobe Air

Hello,

if I try to install or remove Adobe Air, the Install wizard gives me a message, that it's not possible and I should contact my administrator. I'm the administrator on this particular PC. It's a Windows 7 Pro x64.

You'll find the Adobe Air-Logfile below, but I guess I found the reason for the error. The Registrykey for Adobe Air seems to be renamed to "Adobe Air". (HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Adobe AIR)

So the Installerprogram doesn't find the GUID and msiexec also cannot remove it.

And my question now is, how can I remove it?

Edit: I also tried to remove Adobe Air via Microsoft Fixit , but it doesn't find Adobe Air.

[2017-03-20:13:44:19] Runtime Installer begin with version 25.0.0.134 on Windows 7 x86

[2017-03-20:13:44:19] Commandline is: -arp:uninstall

[2017-03-20:13:44:19] Installed runtime (25.0.0.134) located at c:\Program Files (x86)\Common Files\Adobe AIR

[2017-03-20:13:44:21] Relaunching with elevation

[2017-03-20:13:44:21] Launching subprocess with commandline c:\program files (x86)\common files\adobe air\versions\1.0\resources\adobe air updater.exe -eu

[2017-03-20:13:44:21] Runtime Installer begin with version 25.0.0.134 on Windows 7 x86

[2017-03-20:13:44:21] Commandline is: -stdio \\.\pipe\AIR_4388_0 -eu

[2017-03-20:13:44:21] Installed runtime (25.0.0.134) located at c:\Program Files (x86)\Common Files\Adobe AIR

[2017-03-20:13:44:21] Starting runtime uninstall. Uninstalling runtime version 25.0.0.134

[2017-03-20:13:44:22] Exiting due to error: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="Unhandled exception ArgumentError: invalid GUID "null"" errorID=0]

[2017-03-20:13:44:22] Exiting due to error: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="Unhandled exception ArgumentError: invalid GUID "null"" errorID=0]

[2017-03-20:13:44:22] Runtime Installer end with exit code 7

[2017-03-20:13:44:22] Runtime Installer end with exit code 7