explorer.exe is safe to close as long as you know how to start it again (like with batch file above). Once however it didn't start again for me, in that case open task manager (ctrl+shift+esc) select File>new task
then just type in "explorer"
then just type in "explorer"
Specs: intel i5 3570k @ 3.4GHz;
16Gb RAM; Raedon HD 7900;
Win8 64-Bit
16Gb RAM; Raedon HD 7900;
Win8 64-Bit
