FIX: Excel Files Are Slow to Save/Open

Sometimes Microsoft Excel files can take a long time to open. In such a scenario, when Excel is launched directly, it starts normally; when you open Excel directly and then open a excel file, even then the file opens normally; the issue arises when you try to open the file directly prior to running Excel; in this case, the file takes quite a few seconds to start.

This issue can sometimes be caused by an OS level service named “Superfetch” being disabled. Superfetch is responsible for caching the data on the RAM so that, as the name indicates, it can be fetched super-fast when required. A key point worth mentioning here is that enabling it can cause you problems while gaming, but it works pretty nicely with business apps like Excel and Outlook etc. If you don’t think that enabling Superfetch is the way to go then there is another method that we will be sharing and you can try that (Method 2).

Method 1:  Change Superfetch Settings

Start the Superfetch service, by Holding the Windows Key and Press R. Type services.msc and click OK. Locate the superfetch service, right click on it and choose Start.

start superfetch

If it won’t start for any reason, then follow the steps below.

Press the Windows key and type “regedit” in the search area.

The registry editor should open. Expand the HKEY_LOCAL_MACHINE

Now click on “SYSTEM”.

Then expand “CurrentControlSet”.

Now click to expand “Control”.

Then click on “Session Manager”.

Then “MemoryManagement”

Finally click on “PrefetchParameters”.

Now on the right hand side, you should see a field named “EnableSuperfetch”.

Type “1” in the value field to enable prefetching when programs get launched. Alternatively, you can set “0” to disable it; “2” to only enable boot prefetching and “3” to enable prefetching of virtually everything.

Click on OK now and close the registry editor.

Now we have to open the services MSC. To do so, type the windows key and type “services.msc” before pressing Enter.

Now, in the services window, scroll down until you find “Superfetch”. Right click on it and select

Method 2: Modify Registry for Excel

If the method above didn’t work for you, then you can follow these steps:

(Note: This method isn’t the cleanest as it involves deleting some subkey values but it does work so can be tried)

Once again open the registry editor by pressing the windows key and typing “regedit” in the search area, before pressing

Expand HKEY_CLASSES_ROOT.

Then click on “Sheet.12”.

Now expand “Shell”.

Then click on “Open”.

Finally click on ‘Command”.

On the right hand side, you should see a subkey by the name (Default). Double click on it and change its value to: “C:\Program Files\Microsoft Office\Office15\EXCEL.EXE” “%1”

(Note: If your Office folder isn’t located in the path specified above, you can change it. For example, use “Office14” instead of “Office15” used above).

Delete the “command” subkey which should be present right beneath (Default).

Turn your sight back to the left hand side and you will see a key named “ddexec”. Delete it as well.

Close the registry editor.

Your excel files should now open a lot faster than they previously did.

Kevin Arrows


Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.

Expert Tip

FIX: Excel Files Are Slow to Save/Open

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