What to do ?

1. What to do if the command prompt is disabled?

No need to panic. Just do the following: Go to Start - > Run, type gpedit.msc and press OK. A "Group Policy " window opens up. In that, among the options given on the left select User Configurations and then selectAdministrative Templates. From the options displayed select System. This will give you a list of settings. Double clicking on Prevent Access to Command Prompt will open up a window which will display the following setting options - Not Configured, Enable, Disable. Select Disable and press OK. Now you should be able access your command prompt.

2. What to do if the task manager is disabled?

Go to the same path as above. Start - > Run - > type gpedit.msc - > press OK - > select User Configurations - > select Administrative Templates - > select System. Now select the folder Ctrl + Alt + Del Options by double clicking on it. Within this folder double click on Remove Task Manager. Select Disable and press OK.

3. What to do if the system restore is disabled?

Do the following: Start - > Run - > type gpedit.msc - > press OK - > select Computer Configurations - > selectAdministrative Templates - > select System. Now select the folder System Restore by double clicking on it. Within this folder double click on Turn of System Restore. Select Disable and press OK.

4. What to do if regedit is disabled?

Start - > Run - > type gpedit.msc - > press OK - > select User Configurations - > select Administrative Templates - > select System. Now select the Prevent access to registry editing tools by double clicking on it. Select Disable and press OK.

These simple steps can get you going without having to lose data or formatting your system. ENJOY.