A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hard to guess what might be the cause for this issue. Reboot your PC and run chkdsk.
https://technet.microsoft.com/en-us/library/ee8...
Then go into that temp directory and delete all files.
Check also other temp directory on your system and clean them (there are tools available that helps e.g. CCleaner)
Check the free space on your hard disk.
Andreas.
Dear Andreas,
many thanks for your suggestion, i will try.