Those are just warnings and can be safely ignored.
The files that are indicated have a password protection and Avast does not know it and so cannot access the file.
They are files placed on the hard drive by your computer manufacturer
http://forums.lenovo.com/t5/X-Series-ThinkPad-Laptops/Is-there-anything-in-SWTOOLS-that-I-actually-need-to-keep/td-p/578431