I will tell you in this post how to fix the issue manually and how to clean it automatically using a special powerful removal tool. You can download the removal program for free here:
We checked some samples of SPUPDATE.EXE and detected the file SPUPDATE.EXE as threat.
Remove the SPUPDATE.EXE file from your computer right now.
Removal tool: http://www.unhackme.com
Malware Analysis of SPUPDATE.EXE
Full path on a computer: %WINDIR%\SPUPDATE.EXE
Detected by UnHackMe:
SPUPDATE.EXE
Default location: %WINDIR%\SPUPDATE.EXE
Removal Results: Success
Number of reboot: 1
How to quickly detect SPUPDATE.EXE presence?
Files:

- %WINDIR%\SPUPDATE.EXE
- %WINDIR%\MTU.BAT
I use UnHackMe for cleaning ads and viruses from my friend's computers, because it is extremely fast and effective.
STEP 1: Download UnHackMe for free
UnHackMe removes Adware/Spyware/Unwanted Programs/Browser Hijackers/Search Redirectors from your PC easily. UnHackMe is compatible with most antivirus software.
UnHackMe is 100% CLEAN, which means it does not contain any form of malware, including adware, spyware, viruses, trojans and backdoors. VirusTotal (0/56).
System Requirements: Windows 2000-Windows 8.1/10 32 or 64-bit. UnHackMe uses minimum of computer resources.
STEP 2: Double click on UnHackMe_setup.exe
You will see a confirmation screen with verified publisher: Greatis Software.
Once UnHackMe has installed the first Scan will start automatically

STEP 3: Carefully review the detected threats!
Click Remove button or False Positive.Enjoy!