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Hello,<br />
Which version of Excel are you using?<br />
Is the scrolling latency happening on just the one workbook or any workbook?<br />
Is the workbook in classic or native format?<br />
Does the workbook use any macros?<br />
If you use Tab to go to the adjacent cell, does it have latency like the arrow keys?<br />
Do you have any other excel files open at the same time?<br />
Did the latency just start? &nbsp;Have you rebooted the computer to see if it persists?
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Which version of Excel are you using? <br />
<b>2010 but this workbook is 2003</b><br />
Is the scrolling latency happening on just the one workbook or any workbook? <br />
<b>Just the one</b><br />
Is the workbook in classic or native format? <br />
<b>Please explain the difference</b><br />
Does the workbook use any macros? <br />
<b>Yes. All my workbooks contain macros</b><br />
If you use Tab to go to the adjacent cell, does it have latency like the arrow keys? <br />
<b>Yes. Acts just like the arrow keys</b><br />
Do you have any other excel files open at the same time? <br />
<b>Yes and they all work just fine</b><br />
Did the latency just start? &nbsp;Have you rebooted the computer to see if it persists?<br />
&nbsp;<b>Started last night. Rebooted the computer a few times and also did the &quot;Open and Repair&quot;</b><br />
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<b>Additional note: A week ago I made a back-up of the workbook. &nbsp;I opened the back-up this evening, and the arrow keys work fine. &nbsp;I would go back to using the backup, but the workbook gets appended with new information every night.</b>
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Ok thanks for the update. &nbsp;For Classic vs native, is the workbook in xls or xlsm format? &nbsp;Since the work book worked fine last week, how many rows of data are in the work book currently?
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It is .xls. I converted to .xlsm. &nbsp;Still does not work. &nbsp;Previous ones in the .xls format work fine.
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I was planning to do what you recommended. &nbsp;Knowing there were a lot of Defined Names in the workbook, I was wondering how I would move these to the new workbook. &nbsp;I opened &quot;Manage Names&quot; to see what was all there. &nbsp;To my surprise, there were hundreds of Defined Names that all started with &quot;ExternalData_&quot;. &nbsp;See image. I do not know where they came from, but I am sure some macro is creating them. &nbsp;After I deleted all of them, saved, closed and reopened the workbook, everything is working just fine.<br />
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Thanks for pointing me in the right direction.<br />
<br />
<a href="https://filedb.experts-exchange.com/incoming/2016/09_w39/1118644/2016-09-24_9-50-35.png" target="_blank" title="2016-09-24_9-50-35.png (73 KB)"><img alt="2016-09-24_9-50-35.png" class="file-block lazyload" style="max-width: 552px;" data-src="https://filedb.experts-exchange.com/incoming/2016/09_w39/1118644/2016-09-24_9-50-35.png" /></a>
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2016-09-24_9-50-35.png

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bigeven2002 pointed me in the right direction.
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OK great! &nbsp;Glad I could help!
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I have a workbook I use every day. &nbsp;Last night I noticed that scrolling using the arrow keys, it goes very slowly. &nbsp;It goes to the next cell, then there is a delay before going to the next cell. &nbsp;This does not happen in any of my other workbooks.
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I have a workbook I use every day.  Last night I noticed that scrolling using the arrow keys, it goes very slowly.  It goes to the next cell, then there is a delay before going to the next cell.  This does not happen in any of my other workbooks.

Excel scrolling very slow

Microsoft Excel topics include formulas, formatting, VBA macros and user-defined functions, and everything else related to the spreadsheet user interface, including error messages.

Microsoft Excel

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.