When I save a word document or an excel spreadsheet some files with strange names (letters and figures, for example 12BB400) and without type/extension appear in the folder where the original file is located and every time I have to refresh to remove them. My Office is 2010 and I have Kaspersky antivirus. Also these file go away when I leave the folder or when I reboot the computer.
Please help.

Please help.

My Computer
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- Dell
- OS
- Win 7 Pro 64-bit
- CPU
- Intel i5