Uninstall – Left Garbage

You may have "registry adjusted" to death.

Try a Windows 7 Repair Install to see if that corrects the issues. You need the Windows 7 DVD or a working recovery partition.

http://www.sevenforums.com/tutorials/3413-repair-install.html

Good luck, because I honestly think you may need to do a fresh install of Windows.

I already tried that as I stated above "I have tried Windows repair and also Windows reinstall-repair." and no luck.

I will try the suggested method tomorrow, but I am afraid my left over software will be “Not listed” and then I will be asked for “38 digit product code” and then I will be stuck again, unless you have an idea how to find that.
Look here similar problem, not solved:
https://answers.microsoft.com/en-us/windows/forum/windows_vista-windows_programs/getting-an-message-to-enter-38-digit-product-code/9ab305f5-a941-4479-8a63-0f9745d80efd
I am reluctant and a bit pessimistic reading all these.
People try workarounds on registry using wmic under cmd:
https://stackoverflow.com/questions/5063129/how-to-find-the-upgradecode-and-productcode-of-an-installed-application-in-windo

You have tried the first link from what I can see.

The second link is a registry change and you have been doing these, so it may be worth a try, as the next step is to reinstall Windows.

i use IObit Uninstaller

IObit Uninstaller 7 Free
Get rid of unwanted and bundled programs with 1-click to free up disk space, malicious plug-ins can be easily removed as well.

scroll down about 3/4 of the page to see the download link.

i don't know if it will find what is left over from the previous LabVIEW 2017 64bit install...

you could always try to reinstall and uninstall with IObit Uninstaller

> but I am afraid my left over software will be “Not listed” and then I will be asked for “38 digit product code”

No, it works differently.

>People try workarounds on registry using wmic under cmd:

wmic often has problems trying to uninstall or even list even those programs that can be uninstalled in the regular way.

I have tried some of your advises.

1)      @nobus
I do not want to try a system restore because that Labview was installed long time ago in 2017, forgotten and then few weeks ago removed. I do not remember the dates and in mean time many change took places on that PC with all kind of install/uninstalls.
I was aware of this method, because I have seen it when I tried Windows repair-reinstall and at boot was one of the options.
There are also some applications as
Easy Recovery Essentials, that can dig underneath Windows and they claim that an do that recovery to a previous state in a more advanced manner:
https://neosmart.net/EasyRE/?gclid=EAIaIQobChMI7cayl_7z2wIVUVXTCh3SxwlTEAAYAyAAEgIZtvD_BwE

2)      @John
I do not want to reinstall Windows from scratch.

3)      @Paul Sauvé
I forgot about IObit Uninstaller. I used it in the past. I tried it now one more at your suggestion.
It is not better than Revo Uninstaller, that can be downloaded Trial as Pro version:
https://www.revouninstaller.com/revo_uninstaller_free_download.html?gclid=EAIaIQobChMItbGZy__z2wIV8QrTCh0YCgmDEAAYASAAEgJoMPD_BwE
or Total Uninstall:
https://www.martau.com/uninstaller-download.php

Actually I have tried IObit Uninstaller today besides the other 2 and is worse than the other 2 programs, because NI Labview has its own manager used to install/uninstall NI packages and IObit Uninstaller did the cleaning in the background of the NI manager and deleted things without waiting first for NI manager to finish its job and then to scan for leftovers. That is not good. It should wait and scan afterwards. The other 2 programs do that.

4)      @ Vadim Rapp
Surprisingly your Microsoft application detected all the NI left overs that I have seen with WMIC under CMD. And each name of the software listed there and not listed in Control Panel under installed programs was nice removed with some patience.
This jb requires time, I mean long time.
That is the only problem, because NI Labview 2017 64bit installs through NI manager around 204 packages.
So, how do you see me manually, one by one, uninstalling all those packages? It takes eons…
It would have been good as option to have the possibility to select multiple programs listed and then click uninstall and come back after 2-3 hours and done.
Or do you know a script, something that applies to that nice Microsoft uninstaller helper as batch remove of the programs?
What I have done is next:
-      I tried to uninstall only some listed NI packages as NI Uninstaller, EULA, Runtimes, …as few more, around 10-15 I guess
-      Then I installed again the NI Labview 2017 64 and after 1h or more, because is a big software and takes long time, I uninstall it again.
-      This time, from all 204 packages were less than 20 listed.
The solution proposed by Vadim Rapp works, but is slow. At least “I can see the light” and that is a relief.
There are more problems related with and I will come tomorrow with updates.

If these NI packages are not installed products, in terms of what installed Windows product is, then the only party who can find them and remove, is probably NI itself, specifically, this NI Manager. Accordingly, if a script to find and remove them existed, it would be something coming from NI - maybe their Support, maybe their forums, and so on. Here's an example of what I mean: major video card vendors usually create speciial utilities removing all their drivers - for example https://support.amd.com/en-us/kb-articles/Pages/AMD-Clean-Uninstall-Utility.aspx and http://www.guru3d.com/files-details/display-driver-uninstaller-download.html - this is very similar to what you need, only with their own product. Maybe NI has something like this.

As a sidenote, if John is right about the system being badly damaged (hopefully not), it would be only because of having used things like ccleaner, registry optimizers and such. Never use anything that promises to "clean", "optimize", "improve", or "speed up" your computer, your car, or your body.

hey viki - if you keep say i don't want that - you'll end up with no solution
i take it youran the utilities on auto ? then this is apossible result

you said "  I have tried to reinstall LabVIEW 2017 64bit again, but it does not work, it gives me all kind of different errors."  can you post a couple of the first errors you get when tryi,ng?  that can help getting us on the correct path

viki - what you can try is  : make an install on a fresh disk - same drivers and OS if posssible
then copy the labview folders,
compare the registry, etc...
time consuming, but if you don't want to reinstall; looks like a possibility

@ John
I am afraid I will end up with your suggestion, which I knew before I asked the question here.
Maybe is even faster solution compared with all the trials and tweaking that I have tried so far.
 Only that it seems as a nightmare for me and that’s why I avoid it. It is a nightmare because are many programs installed and will take me a lot of time to re-install and activate each one.
So, if I go on your proposed direction, do you know any easy way that I can somehow back up the installed programs, let’s say I clean the disk C, even format if is necessary, then re-install Windows from scratch as new, but then an easy way to roll back all the programs, a kind of backup, so I do not have to install each one by one?

@ Vadim Rapp
Your proposed solution worked good in the end. Using the provided Microsoft Install Uninstall Troubleshooter helped me to install again LabVIEW 2017 64bit and then I was able to uninstall it and most of the tracks were gone. The few tracks I removed manually. It worked, but the system, the registry seem damaged somehow because are further errors as for instance:
-      After reinstall-repair Windows 7, I have got Internet Explorer 8 and when I try to upgrade Internet Explorer to v10 or v11 then the installation process starts and then it fails.
-      Other programs that I must install and uses LabVIEW Runtime 8.5. and some other NI software lower version than 2017, now they install, but they cannot start properly. If is needed I can give details, but are many details…and I do not know if you want to read them.

@ nobus
“hey viki - if you keep say i don't want that - you'll end up with no solution”
Is not like that. I just proved with my previous comment that I tried some of the proposed solutions, but I did not want or reinstall Windows from scratch and either not to restore, because I am afraid that I will lose many actually programs installed in mean time- it is just a limitation of the existing situation, is not because I do not want because I am stubborn somehow. The same applies to your last suggestion. It seems really time consuming and I would prefer reinstall from scratch rather than your last suggestion. It would be faster definitely.

@ serialband
I went through most of the comments from NI forums and direct help and did not help me. I do not remember if I have read all the pages suggested above by you, but I will read them now. What I remember is the last link, which did not help because I could not arrive to NI Manager Uninstaller. But now that problem is solved. I will just check if are any other leftovers on the folders on C. I will come back later with more comments.

ok - if you don't like a "dirty" install  -it' s your choice

I think is time to close the question.
Enough advises have been given.
The most helpful for me came this time from Vadim Rapp. It really helped to get rid of NI Uninstaller 2017.
I am afraid what John suggested from beginning, and I knew ii, but I wanted to avoid it by asking here the question, my nightmare will come true in the end, but I still avoid that by delaying it will all kind of trials, until I will get sick of it and when I will be furious enough I will do it. I still have patience, but I think of backing up slowly all installed programs.

Thanks for the update and good luck with the computer