Hi ​@intruderxxx -

Only thing I can think of to try is completely uninstall/reinstall VAW from Programs/Features. Check for folder removal as well in Program Files, Program Files (x86), and ProgramData as well as in the Registry. Reinstall VAW and see if you can get working again.

Best.

I would agree with Shane to remove everything and reinstall.  Also which version of the agent are you using and did you check the system requirements? 

https://helpcenter.veeam.com/docs/backup/agents/system_requirements_windows.html?ver=120

is there maybe a cleanup tool ?

There isn’t one by Veeam. You can search for some like below:

https://www.wisecleaner.com/wise-program-uninstaller.html

There was a tool I used several yrs ago but I forgot what it was. If I recall the name, I’ll share it.

Not an official one from Veeam that I am aware of.  You could try Revo Uninstaller as that is what I use and it cleans files plus registry too.

This reddit thread mentions a few tools you can check out:

https://www.reddit.com/r/software/comments/10xf3ck/what_is_the_best_uninstaller_for_windows/

Well that did not help :(

I have performed unistall,

Deleted files from c:\Program Files 

Deleted files from %programdata%

performed search for files in local and roaming profile none found 

performed deletion of all veeam settings in registry 

performed restart 

reinstalled and still the same issue 

*******************************

Failed to start service

‘VeeamEndpointBackupSvc'.

Click Retry to attempt to start the

service again. Click Cancel to

continue installation without

starting the service.

********************************

according to log the service was registered but i dont see it in the service list 

Very weird :/

So, it appears this service didn’t install and is needed. In VBR, there is a directory where all individual services and app instrallers are located. My guess is the same is true for the Windows Agent. Unpack the ISO and look in the folders for this service installer and attempt to install it. Other option is to open a Support case. Even with the Free edition you can open a case via the Console:
https://helpcenter.veeam.com/docs/agentforwindows/userguide/support.html?ver=60

https://helpcenter.veeam.com/docs/agentforwindows/userguide/support_report.html?ver=60

its stand alone no VBR , no iso to unpack i just an EXE file 

I dont have a working client to open a case, it doesn't skip and it doesnt cleanup after failed install when  i cancel even though its supposed to .

this seems to be an issue with sql lite database that veeam is using and not cleaning it.

it just tries to use the previous info and not performing clean install 

Might be time to contact support at this point.

What version of the agent are you using?

Tried these 2

VeeamAgentWindows_6.0.0.960.exe

VeeamAgentWindows_6.3.0.177.exe

The second one should work.  The first is much older and may not support the version of Windows.

6.3 supports up to  windows 10 22H2.

Have you tried installing it via command line with verbose logging enabled?

Is there any AV that could be causing the issue?

Which version of the agent are you using? I agree with both Shane and Chris to perform a clean re-install (with a reboot in between and afterwards) but maybe there is an update of the software.

Are you trying to use a specific service account with the service by any chance? This might cause trouble in case that there is anything missing.

Well this is the point i am giving up

1- have disabled antivirus 

2-have performed purge from registry and all linked files 

3- install from command line doesnt accept any options 

4- tried over 10 different installs today and still the same result 

5- tried opening a case with my VMCE account and my work account i get that i am not registered lol

Time to try something else 

Thanks everyone for your help , even though i did not get the result i wanted 

I appreciate your time and effort

No worries ​@intruderxxx . Sorry we couldn’t get you sorted.

Best.