Excel slow to open on Windows 10

I’ve been having an issue with Excel 2013 (from the Office 365 Click to Run installer) for a while now that I finally decided to dig a little deeper on.

I found that when I was double clicking on a file from Windows Explorer to open in Excel, it would take 15-30 seconds before the application would appear.

However, if I opened Excel from the start menu, or through a “Run” command, it would appear instantly.

I tried many different things to isolate this issue such as checking conflicting processes, watching processmon, and eliminating the network as a source of problems.

 

Eventually I hit the right combination of google keywords and came across this post.

 

Based on that recommendation I disabled Cortana and immediately saw improved response times from Excel. Hopefully Microsoft fixes this bug in time for Office 365 integration with Cortana!

 

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