TaskBar blocked
The taskbar or desktop items are managed by the process explorer.exe. Below is a small tip of how to fix this error temporarily.
Press CTRL+ALT+DEL to launch Windows Task Manager.
Select the Processes tab
Stop the process
explorer.exe.
Go to menu
Start and select
Run
Enter explorer.exe,
OK!
The problem of taskbar not functioning properly may be due to windows not functioning properly.
It is recommended that you make a complete scandisk of your computer using a software like HiJackThis. (Click on below link to download this software)
http://www.trendsecure.com/portal/en-US/tools/security_tools/hijackthis
This error may also be a file missing or corrupt. Below is an available tips of how to solve this problem:
Corrupted or missing files