Is It Possible to Solve "0x8004fc12 office 365 activation error" Instantly?
The post will explain what is 0x8004fc12 office 365 activation error? What causes 0x8004fc12 office 365 activation error? How to solve x8004fc12 office 365 activation error issues?
Symptoms of 0x8004fc12 office 365 activation error
0x8004fc12 office 365 activation error problem occurred when your PC is unstable and critical system files fails to respond or starts missing. It happens when your computer is not being maintained regularly. To avoid further damage and bad effect you need to solve the problem immediately.

  • hardware error keeps popping up
  • checksum error pop-up
  • execute error pop up
  • software turnon with fault
  • display facility failure keep popping up
What causes 0x8004fc12 office 365 activation error
  • Sometimes, when you would like to update your windows system, some vital dll files or registries files could be missing or corrupted.
  • Install or uninstall programs in a bad way and infected with Virus or Trojan.
  • System drivers are damaged or installed wrongly.
  • ratify not success to turn on background service
  • hardware settings disappeared
  • .sys file conflicted
  • OS failed to register program
  • Task Manager disabled
The way to Troubleshoot x8004fc12 office 365 activation error Problem?

An efficient way to resolve this 0x8004fc12 office 365 activation error is to use SmartPCFixer. We highly recommend you to do the following steps.

1. Click the below button to download SmartPCFixer.

2. Launch SmartPCFixer and run a complete scan for your PC.

3. Click Fix all to get rid of 0x8004fc12 office 365 activation error.

Repairing x8004fc12 office 365 activation error error mannually
1.Click Computer on your desktable and right click Disk C to select Properties.

2.Click Disk Cleanup, you'll see a window just as right, this process need some minutes.

3.Under Disk Cleanup there are Files to delete, tick the files you don't need to free pc space, finally click OK.

"Windows Update" is a module which used for upgrading the windows system, with it, we can upgrade the system, expand the system functions, make our system more supportive for softwares and hardwares, and keep a more stable system environment. Follow steps given as below, it is easy to install windows update.
1.Click Start button at the left corner of screen, and click Control Panel:

2.Click the option of Windows Update on new opened window:

3.After step 2, a new window - Windows Update will be opened, and click on Install updates

After all above steps finished, the process of installing windows update is completed.


From all the reasons above, it is obvious that solving 0x8004fc12 office 365 activation error is a little complicate for people. We highly recommend users use SmartPCFixer to deal with this problem. 

Tips & Warnings

1. You must run as an administrator, no matter what steps you will do about your PC.

2. According to your computer windows system, the above steps may be slightly different, but the basic process is mostly the same.

About SmartPCFixer
SmartPCFixer is a strong error-resolution registry cleaner which will fix many computer errors and optimize system settings. It could scan, clean, optimize your computer, and keep your personal computer in healthy condition! This software will find and fix any errors or malfunctions that your computer may face. Using it, you can fix your system errors with an easy click. It will also prevent your computer from various virus's attack.
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