Go to Start and type in "gpedit.msc". Go to User Configuration, right-click Administrative Templates, Filter Options, change Configured to Yes, then OK. This will show you any local policies in effect on your computer applied to the users. These policies, unless targeted at specific users, will apply to a user regardless of whether they are an administrator or not. If there is not a policy enabled affecting the Taskbar, then there may have been a registry change, resulting from some application you installed or from malware.
My servers windows 2008r2 Taskbar got disable. When i click on taskbar and properties it said Restrictions, This operation has been cancelled due to restrictions in effect on this computer. please contact your system administrator, even though i am the administrator. Can someone help me to turn it back on?
Servers 2008r2 Taskbar