Switch Workbooks functions

[BoBoSlacke]

I just bought a laptop computer and am running six Office 365 Excel Workbooks that are connected to each other.  On my desktop computer I can switch between the workbooks by using 'ctrl-tab' and they show up in sequence, but on my laptop I can only switch between two of them at a time.  I created a macro with the 'ctrl-tab' and assigned a shortcut key 'ctrl-w' to run it from my Personal.xlbs, but with the same result on the laptop.  It works just fine on the desktop computer.  Please, let me know how I can get it to function the same on both units.

Desktop Intel Core i7-2600s, 8 GB, 512 SSD, 1.5 TB HDD

Laptop Intel Core i5-1035G1, 12 GB, 512 SSD

[#2]

@BoBoSlacke 

I suspect that you may have been using a very old version Excel.  With your new PC, you also upgraded to a new version of Excel. 
Here's a description of Ctrl-Tab
Ctrl+Tab : Switch to the next child window of a Multiple Document Interface (MDI) program

Your description lines up perfectly with the MDI interface.  MDI was removed from Excel quite a while ago in favor of SDI interface.  As a result, Ctrl-Tab won't keep flipping thru any more.  

As a workaround, you may need to use Alt-Tab, which will tab thru all open apps.  

[#3]

@davheili 

Thank you for that answer, but it looks like a step backwards.  I am subscribing to Office 365 on a yearly basis and assumed that they gave me the latest versions of Excel and Word on all my covered computers.  I will try the Alt-tab instead, but that will step through all my open programs and workbooks, so I might encounter email, Google and other open tasks.  I am running two screens and do normally have several tasks going on at the same time.    

[#4]

@BoBoSlacke 

If your old PC had O365, then I don't really have an explanation.  I believe the last version of Excel that had supported MDI was 2007, which pre-dates O365.  
Here's a link to an Excel UserVoice forum discussing the elimination of MDI.  You can see that Ctrl-Tab is mentioned in the suggestion.  
https://excel.uservoice.com/forums/304921-excel-for-windows-desktop-application/suggestions/11706627... 

[#5]

@davheili

Thank you.  I checked and both my computers are running Excel Version 2012 (Build 13530.20376)

The Alt-tab also just toggle between two open tasks, and you must hit it twice or more to get to the workbook you want.  So it is still a mystery why the computers acts different.