LTSpice won't work on my brand new windows 11 pro machine

Hi Steve42 ,

OK, let's see what we can figure out.

Steve42 said:

 I tried downloading regular LTSpice for windows 11 and even the one at https://LTspice.analog.com/download/24.1.10_test/LTspice64.ms

Since 24.1 is not working either, it doesn't appear to be a version problem.

Steve42 said:

Program installs correctly and when I select LTspice updates it works and says "up to date"

I have to assume this is not the option in LTspice Help menu, since you aren't able to run LTspice at all. Is this a Windows thing or the end of LTspice Install?

Steve42 said:

Program installs correctly

OK, assuming you are using the msi GUI, and not the command line, what selection have you made:

• Install for Me
• Install for All
• Server

Steve42 said:

then running msiexec /i "<Path to>\LTspice64.msi" /L*v "<Path to>\MyAppInstall.log

Can you share the log file? That might help.

Steve42 said:

Ironically we purchased this 5.3GHz 18 core latest and greatest mostly for LTSpice which is the only app that won't work.

That should be more than enough processing power.

Steve42 said:

Hi LTSpice won't work on my brand new windows 11 pro machine.

Can you share all specs including Win 11 update version. Is your machine managed (by an IT department) or did you set it up without any central management software. Do you use onedrive (of course you do; M$ wouldn't allow you not to), or google drive? Do you have an older machine that does run LTspice with the same install?

Steve42 said:

We are an ADI design partner and really need some support here thanks.

We'll get you running somehow.

mike

Hi Mike, LT Spice update check is via separate LTSpice app "check for updates".

I have tried recommended "instal for me" and "install for all" on different installs the problem is the same.

no install log file is created, both me and my IT guy have tried. 

CPU Intel(R) Core(TM) Ultra 7 265 (2.40 GHz) (HP claim clocking to 5.3GHz)

RAM:16.0 GB (15.4 GB usable)

Windows 11 version:25H2 build: 26200.7840

No we don't use Onedrive, for security my IT guy uninstalled it because it kept diverting sensitive files that we were trying to save to  C: to the MS cloud instead. The HP IT person who looked at this tells me it shouldn't present any problems. (unless LTSpice is assuming a MS cloud for some reason but it didn't need for windows 10 so assuming this isn't an issue) Also as I mentioned Altium works just fine without MS cloud. Best Steve

Steve42 said:

No we don't use Onedrive, for security my IT guy uninstalled it because it kept diverting sensitive files that we were trying to save to  C: to the MS cloud instead. The HP IT person who looked at this tells me it shouldn't present any problems. (unless LTSpice is assuming a MS cloud for

I only ask, because, sometimes Onedrive is the problem. LTspice doesn't need a cloud drive. Actually works best in a completely local environment.

If you can run msiexec from the command line with the verbose log and send the log, that might help. Would suggest "Install for Me".

msiexec /i "<Path to>\LTspice64.msi" /L*v "<Path to>\MyAppInstall.log

Thanks,

mike

Hi Mike, Just completely reinstalled LTSpice configured "install for me" and ran DOS command but get an error message "error opening log file. Verify that specified log file location exists and is writeable"

. Best Steve

Hi Steve42 ,

OK, that is strange, suggesting you do not have write permissions to some of the directories or for certain types of files. M$ has mucked with msi recently, so could be something there. Logging an msi install is very old, and pretty much always works, so it is possible M$ has broken it, as it is wont to do…

I'm gonna have you uninstall any LTspice installs you have and try something else. But, before you do that, what are the contents of …\users\[yourusername]\appdata\local\LTspice as of the last install? You can screen shot if you like. Or, let me know if that directory is empty or doesn't exist.

OK, once you see if there is anything in appdata, uninstall LTspice. Then, try installing and choose the server option. This will place LTspice in Programs. Then, start LTspice. When you start LTspice, it will unpack the libraries into your appdata directory.

mike

Hi Mike, here is the current appdata LTSpice content all looks good and drilling down all the right files appear to be there . Do you still want me to uninstall ?

Best

Steve

Tried server option installer hangs at "installing LTSpice" nothing in task manage either (see below)

Hi Mike,

Actually it's worse than I thought when I try to cancel the installation it just goes back to frozen setup wizard so will need to know process name so that I can kill it in task manager. Best Steve

Hi Steve42 ,

Steve42 said:

Hi Mike, here is the current appdata LTSpice content all looks good and drilling down all the right files appear to be there . Do you still want me to uninstall ?

That looks right for 26.0.1. Does the install/startup fail with the "Update Components" process that happens after install? This could be the problem. I wonder if this is Win PRO specific.

Steve42 said:

setup wizard so will need to know process name so that I can kill it in task manager.

It is: Background Processes > Windows Installer. I just installed on a brand new ultra 9 Win 11 personal. I will try to uninstall to confirm task name.

mike

Hi Mike it looks like the server version doesn't even install the app or updates.exe below is all that was installed so looks like the regular windows 10 version is the best option. At least that installs along with apps and subfolders. My guess would be LTSpice needs a DLL that isn't present on windows 11 pro. By the way I restarted PC to get rid of crashed install screen for server version. I also looked in add/remove programs no LTSppice applications were present so I've reinstalled the regular version and now all of the directories have loaded it just won't run as before.

Best,

Steve

Server version install looked like this:

Regular version looks like this after install: