Đề tài: Helpppp - Đây là lỗi gì?

anh thử làm theo hướng dẫn này xem sao.

1.Click Start > Run. Type MMC and then click OK.
2.Click Console and then click Add/remove Snap-in.( trong mục File )
3. In the Add/remove Snap-in dialog box, click Add.
4. In the Add Standalone Snap-in list, click Group Policy, and then click Add.
5. In the Group Policy object window, click Finish.
6. Click Close, and then click OK.
Go to Local Computer Policy(sau khi Ok thì sẽ có mục này ở bảng ) > User Configuration > Administrative Templates.
Click Desktop.
7.In the right-pane, Right-click Hide my Network Places icon on desktop, and then click Properties.
8.Click Not Configured, and then click OK.
9.Expand Windows Components, and then click Windows explorer.
10.In the right pane, right-click Prevent access to drives from my Computer, and then click Properties.
11.Click Not Configured, and then click OK.
12 .Quit the Local Computer Policy MMC snap-in