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How to Fix Windows Update 0x8007F021 Problem with SmartPCFixer?
Step 1 Download and install SmartPCFixer.
Step 2: Launch SmartPCFixer and click Quick Scan to run a free scan for your PC.
Step 3: After the whole scanning, please click Fix All to troubleshoot Windows Update 0x8007F021 error automatically.
1. Update your windows system to the latest version.
Sometimes, people like to ignore microsoft's update remind messages. This may cause the critial disaster for your PC. Please click Start, Control panel, System Security, windows update step by step. Then click check for update to see if you have missed the latest update.
2. Uninstall the recent installed software at once.
Attention: Before you try to install a new software on your PC, please confirm that you download the program from its official website. Because the 3rd party website always bring virus or trajon for your PC.
3. Run a sfc for your PC.
Sometimes, if you come across Windows Update 0x8007F021 error, it is smart to run a sfc for your while system. This procedure will help you fix most dll error. System File Checker is a utility in Windows which allows users to scan for corruptions in Windows system files and restore corrupted files. If a Windows Resource Protection (WRP) file is missing or is corrupted, Windows may not behave as expected. For example, some Windows functions may not work, or Windows may crash.
Do as the following steps (Windows 7 or Windows Vista)
1. Click "Start" Button, and type CMD in the searching box. Right-click "CMD", then run as administrator.
2. Type sfc /scannow and press "Enter" button
3. After the process is finished, you may receive one of the following messages:
- Windows Resource Protection did not find any integrity violations. (This means that you do not have any missing or corrupted system files.)
- Windows Resource Protection could not perform the requested operation.
- Windows Resource Protection found corrupt files and successfully repaired them.
- Windows Resource Protection found corrupt files but was unable to fix some of them. (In this situation, you had better do a system restore.)
Registry cleaner: Fix registry errors and deletes dead keys or values such as startup entries that a 3rd party application forgot to delete, which could lead to problems during startup. It also effectively remove invalid file type pointers and orphaned entries within the list of installed applications which may cause problems when installing or uninstalling applications.
Dll Removal: Have you ever been bothered by dll missing error? Luckily for you, with SmartPCFixer, you will never be annoyed by dll errors. SmartPCFixer has Dll Download function which is capable of downloading and registering missing dll files for you with simple clicks.PC Booster: Specialized in solving bsod error, repairing access violations error and solving application not responding problem, SmartPCFixer will always offers users the totally new experience. Just install it and give it a shot.
300 MHz Processor,
256 MB RAM,
50 MB HDD
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If all the above steps still doesn't work, please try to do a system restore for your computer. SmartPCFixer is also able to perform a system restore for you.