Unchecking
Hide protected operating system files [Recommended] is what causes you to see that looping.
Have you tried running
sfc /scannow from an Elevated Command Prompt? That should correct any missing or corrupted system files. Once you do that and reboot, click on
Start then
Run or press
Window key (next to left Ctrl key) +
R and paste the following into the Run box, exactly as shown, including double quotes:
cmd /c "ipconfig /all > postme.txt & ping yahoo.com >> postme.txt & notepad postme.txt & del postme.txt"
and press
ENTER.
A file will open in Notepad. Please copy and paste the contents here. Close the Notepad window and the file will be deleted and the Command Prompt window will also close.
If you don't have a Run selection off the Start menu, see here:
Enable Run Command on Windows 7 or Vista Start Menu
How to open an Elevated Command Prompt:
Click on
Start,
All Programs,
Accessories
Right click on
Command Prompt and select
Run as administrator.