Missing Icon's following TimeMachine restore - High Sierra

If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in Safe mode (press and hold the shift key down at startup). It can take much longer to safe boot (5 min) so be patient.

How to use safe mode on your Mac - Apple Support 

Safe mode very often corrects weird software behavior by forcing the OS to do cache clearing and other housekeeping. When you're in safe boot, the machine will not be at its best performance, especially with graphics, but that's expected.

Does the problem persist while in Safe mode?

Often not required, but consider allowing the Mac to "soak" in Safe mode for an hour to allow maintenance routines and processes time to complete, then exit safe mode by restarting your Mac normally and re-evaluate the issue again.

It looks to me as though I need a script to enter into terminal to get the system to re-build the icons.

Refer to How to rebuild Launch Services Database in Sierra?

Caution #1: I can confirm that procedure works for Mojave and earlier macOS versions. You did not indicate which macOS version you have, but from the MSFT Word "Get Info" page it looks like a fairly old version.

Caution #2: In my personal opinion it's not worth doing. If you should choose to do that anyway, please heed all the warnings and reboot your Mac afterward.

Paul Reading2 wrote:

I have installed a new SSD into my iMac restored my computer but... I have loads of applications which are working but the icon images are missing? I have logged into TimeMachine and tried re-installing a version with the icon showing correctly but it does not change anything. If you do CMD-I you can see that the icons are in the package.

It looks to me as though I need a script to enter into terminal to get the system to re-build the icons.

https://discussions.apple.com/content/attachment/48ee71fa-1474-4d6e-9782-5d2ab2388a61

Missing where?