Copy Pasting in Excel 2007 Freezes My Computer

Detect and Repair
1. Open a new document in Microsoft Excel 2007.
2. Click on the 'Help' tab on the program's task bar. In the drop-down menu, scroll down to the program called 'Detect and Repair.' Click the program to begin it.
3. Allow the 'Detect and Repair' program to run. Hopefully, the program will fix any errors you have with your Microsoft Excel 2007 program. If the error persists, move onto the next section.
Edit Your Registry
4. Click the 'Start' menu and scroll up to 'Run.' Type in 'regedit' in the box and press 'Enter.'
5. Scroll through the folders until you find the pathway that is 'hkey_current_user\software\microsoft\office\10.0\excel.' This is the name for Microsoft Excel 2007. Right-click the folder, click on the option to 'Rename' and change the name to something else. Hit 'Enter' to complete the name change. Exit the registry editor and return to your desktop.
6. Open Excel on your desktop. This may resolve the problem that occurs when you copy and paste cells in the program. However, if it does not, you will need to reinstall the program.
Uninstall and Reinstall
7. Click on 'Start' and scroll up to 'Control Panel.' Choose the option to 'Add/Remove Programs.' Scroll through the list to locate 'Microsoft Excel 2007' and click the option to 'Change/Remove' the program. Follow the instructions to delete the program and restart your computer.
8. Insert the Microsoft Excel 2007 installation disc into your computer. Your computer will read the disk and begin the Installation Wizard. Follow the instructions to install Microsoft Excel 2007 onto your computer. You may need to restart your computer for the installation to take effect.
9. Open Excel 2007. When you open the program, you should now be able to copy and paste cells without the program freezing up on you.