We know when we make mistakes in MS EXCEL then UNDO option is needed. We can use UNDO approximately 16 times. If we want to increase undo in MS EXCEL then make the following registry edits.
Copy the content below to a notepad and save it as .reg file
Windows Registry Editor Version 5.00
Now save this file as undoExcel.reg
when saving this file Save as type All files, and double click it to run it. Note: If you want to undo for MS EXCEL Office 2000 version the just change 9.0
instread of 10.0.