Enable Windows Faster Task Switching

To Turn This Off After Your Reboot:

Run MSCONFIG

Click on the Startup tab

Uncheck Taskswitch

Click on the OK button

If you want to keep working, click on Exit without Restart

To Turn This Off Immediately:

Press Ctrl-Alt-Delete

Click on the Processes tab

Highlight TaskSwitch.exe

Click on the End Process tab

Click on the Yes button