If you can run Regedit, then go to
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Policies\Explorer]
Chang value of dword "NoControlPanel" from 1 to 0.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Policies\Explorer]
Change value of dword "NoRun" from 1 to 0.
[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Policies\System]
Change value of dword "DisableTaskMgr" from 1 to 0.
or simply delete these dwords from their respective places and restart.
To remove these and more restrictions u can use a tool called
Remove Restrictions Tool from
www.sergiwa.com