Steps to Solve this problem.
Step 1: Start you PC in Safe Mode
- Use F8 to start you PC in safe mode
- Or may be different for different system
Step 2: Go to My Computer
Step 3: Double click on windows folder
Step 4: Open SoftwareDistribution Folder then--> Download
Step 5: Delete all folder from download folder
Note: Please make sure your doing this very carefully.