Windows 10: Start Menu Not Opening - Windows 10 64 bits

SOLUTION: Go to C:\Users\YourUser\AppData\Local\Microsoft\Windows, and rename UsrClass.dat to UsrClass.dat.old, ​and restart your computer.
If it doesn't work, you can create another admin account and make the same thing with your second account.

*Arrow Remember that this process will delete all your windows apps. To restore them, all you need to do is type this command in an Admin Powershell:

Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register
"$($_.InstallLocation)\AppXManifest.xml"}

This worked fine for me, hope it works for you too *Smile

 

@Gabriel - Tried your solution. Didn't work for me, but thanks for posting. It did however remove the critical error message I was getting when I clicked on the start button, now, it just does nothing. I guess that's an improvement of sorts *Smile

If it werent' for my 3d graphics applications It wouldn't be so bad. I've created a new user that I'm using for everything but those. I have to use the gimped user for the graphics program because I'm too lazy to re-do years worth of file and library paths for the program. *Smile

 

No problem, hope you find a solution soon *Smile
Just a question, have you already tried "sfc/scannow"?

 

Yep, this has been an ongoing problem for a few weeks for me. Every day I search the net for a new idea or fix. none have worked for me yet. Hence, setting up the new user account. Kind of a pain but...oh well. I can get to everything I need other than the Microsoft store..and that's no big loss to me *Smile

 

I kept my Windows 7 drive cloned and that's how I reverted. I couldn't figure out how to revert otherwise.

I use Macrium Reflect to clone. It's good.

 

@Gabriel25569
As stated earlier in the thread, the powershell and other fixes "seem" to work at first, fixing the problem. However the issues of dissapearing StartMenus and Taskbars in Windows Ten reappear later. I'm up to three machines with the problem(s). Two are on a domain, one is not and they all have nothing in common. Two upgrades from Windows 7 and One installed from scratch. In all cases, the Taskbar and/or StartMenu just stop working. Might be fine for days, then stop. Sometimes a reboot or logout/login fixes the problem. Sometimes not. No discernible pattern that I've found. The powershell "reinstall" seems to fix it but it always comes back.

The best part about Windows Ten so far seems that the "Downgrade back to Windows 7" process seems to work very well. I've taken one machine back to Seven and every single bug introduced in Ten has gone away.

Very dissapointing overall.

 

I installed Windows 10 over my Windows 7 64 bit five times, and each time had the start menu problem. I use Acronis to backup an image of my computer, which successfully got me back to my Windows 7 each time. I also tried all the fixes that were being suggested, but without success. I then decided to try a clean install of Windows 10 and then reinstall all my software ( which was a pain ). When I tried to reinstall my Norton anti virus software, it said that this version of Norton was not compatible with Windows 10 and I must install the new version, which I did, and it worked fine. I was wondering if perhaps this was causing the problem of the start menu? Incompatible software which was trying to install over an upgrade?
Anyway, after a couple of weeks using Windows 10, I do not want to go back to 7, but I'm keeping the Windows 7 image a while longer, just in case.

 

Thanks for the post, and glad it got fixed for you. My start menu still does exactly nothing after trying this no matter how long I wait, but atleast the new user works perfectly (Win+E is instant like it should be, and start menu opens the moment I press it). Seems like the theory that the user account gets corrupted is correct, instead of it being the windows files. Having to create a new user every other week after it gets corrupted is still pretty damn annoying though *Huh Damn, was really hoping for this to work! Is there any other fix out there, or are we just going to have to wait for microsoft to sort it out? Having some dreadfully slow windows functions and some that do not even work at all can get frustrating after a while..

 

There are some solutions related to Powershell scripts.
I saw one guy that got the menu fixed, by changing theme to one of the Contrasts Theme, and then reverting it to the original.