Iconpackager is not compatiable with Windows 10. Could that be the issue?

believe it or not I had the same problem with win 10 when I first upgraded. But along with the icon problem I had display flashing and could not pin icons to start menu. Ok enough said about I did however uninstalled Win 10 upgrade and got a new upgrade. Same thing happened again and could not believe it. Finally I said enough with the upgrade and did a full clean install of Win 10 and I backed up my old drivers from Win 7 and did not allow Win 10 to install drivers I installed them myself. Now after that all is well I have perfect icons ,display is correct and I can pin icons anywhere. Using my old drivers did the trick and then I updated the drivers myself after the install. Good to go

IconPackager is not compatible with Win10. It's very possible that may be the cause.

First apply the default icons as well as IP will allow.

 Second UNINSTALL IP, it is NOT compatible with Windows 10 yet.

 Third: Go to 'Start' open run command, type in Regedit. (Or just type Regedit in the search box)
In the new window of Registry Editor go to HKEY_CLASSES_ROOT\exefile\shellex and delete the subkey/folder 'IconHandler'

Restart your computer.

https://forums.wincustomize.com/331217/page/1/#3434612 

 Apparently, Win10 doesn't like that reg key at all.

 Just do a forum search for blank white  icons.

Right - I think I had IP installed while I had Win8. Simply to change the icon of one or two file formats.

I uninstalled IP.

Rebooted.

Opened Regedit, backed up that key and deleted it.

Rebooted.

Still white icons in the start menu. (Not anywhere else though.)

Might the icon cache need rebuilding? And how do you do that in Win10 without IP? (Searches for rebuilding icon cache tend to point back to IP...)

Still not sure how to rebuild icon cache on Win10 - appear to have changes since previous versions.

Just to clarify though - it's only the Start menu that display blank icons - the rest if fine. When I open the folder containing the start menu shortcuts they are all correct.

Oooh! So I think I might have found the last piece of the puzzle. 

At one point I right clicked on one of the links and use the Change Icon button - picking the same button it had.

Then I noticed after reboot it had updated.

I then tried via the console to touch all the *.lnk files in the Start Menu folder - and one by one they came back!

That being said - I had in a previous attempt used a batch script to delete all the IconCache*.db files in %USER%/AppData/Local/Microsoft/Windows/Explorer. And run Disk CleanUp and deleted icon thumbnails.

Maybe one of those steps also had a play in this - not just issuing the touch command. But at least I got my icons back and I can visually tell them apart.

Thanks for your help and suggestions folks.