Error 4 Solution

1. Remove the software which you installed recently.

Run SmartPCFixer, choose System Tools, and click Uninstaller, then choose the software you have just installed.

2. Update your Unknown to the latest version.

For windows 7 users:

Click Start, and search windows update as the pictures below:

Click check for update, and update all the important updates which windows recommend for you.

3. System restore is always the best way to fix common computer errors.

Please visit Microsoft website to

Windows 10 system restore:

http://windows.microsoft.com/en-us/windows-10/windows-10-recovery-options

Windows 7 8 system restore:

http://windows.microsoft.com/en-us/windows-8/restore-refresh-reset-pc

A fast solution to this Error 4 is to use SmartPCFixer. We highly recommend you to do the below 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 Error 4.

1. Whatever steps you want to do for your computer, you had better run as an administrator.

2. According to the version of Windows you're using, the above steps may be slightly different, but the basic process is mostly the same.