When cell selected can't use arrows to move to another cell while pointer is over the cell

[raphail]

When I use the mouse pointer to select a cell I can't use the arrow keys to move to another cell while the pointer is over the cell and I can't edit the cell while the pointer is over the cell. If I move the pointer away from the cell then I can move around and edit as normal therefore I don't think this is a scroll lock issue.

This issue also happens when I select a tab. If I select a tab and then leave the pointer over the tab I selected then I can't use the arrow keys to move around the worksheet or edit a cell; if I move the pointer away from the cell then I can move around and edit as normal.

Has anyone else had this issue; I am using MS Excel 2010.

[scott.s.fower]

it does this even after a reboot? I've never had it happen in excel, but other strange things always seem to happen