Could you create a new user with Administrator rights, login with the new user, download and run QS it in there? (I suppose the Windows are SP3?)
Else, some times some of the Windows XP system files are corrupted and there is a fix for it by executing the command "sfc /scannow" in Start >> Run command, or by pressing WinKey+R. This sfc tool (System File Checker) will try to fix any system file and you could try again to run the QS but after a Windows reboot and is available in all versions of Windows.
And as last follow up, if nothing of above solve it, please give a look in this post.
sorry been away.
not sure any of these responces are what im looking for.
simple thing is it was working fine upto about 1 month ago
nothing chnaged on the machines(several have this problem) apart the passing of time
i feel it's something TV have done to try and make users upgrade
if i remake our regiestered QS10 app from my dashboard it starts working again
reinstalling windows should never be a solotuion to something like this, you can't just simply reinstall windows when the equipemnt is in a working enviroment.
I was asking about what it was the final result and conclusion after the contact with the support team of Microsoft.
I never prefer the final solution of reinstall the operating system, but some times it is the only solution.
Have you tried to add a new user with admin rights and run it from there?
Have you fully uninstall and reinstall the app?
Thank for understanding and best regards