I came across a PC at work earlier today which was displaying a spreadsheet like shown in the attached image. It cant be maximised or minimised or resized in any way but existing content can be edited/deleted and new content can be added as normal. However, all other spreadsheets work fine. Has anyone come across this before? And if so, how did you manage to fix it? It looks like the information is going to be copied and pasted into a new spreadsheet, but I thought I'd ask to see if anyone knew how to sort the problem should it happen again.