How to remove the sys virus

Most antivirus programs identify sys.exe as malware—for instance TrendMicro identifies it as TROJ_GEN.R1BC4GF or WORM_HOOON.A, and Symantec identifies it as WS.Reputation.1 or W32.SillyFDC.

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

Click to Run a Free Virus Scan for the sys.exe malware

Sys.exe file information

Windows Task Manager with sys
Sys.exe process in Windows Task Manager

The process known as Pf49Hgo3MEn7j6CJx18FsGp20Dey5S4Rcq0BNd53ZzXk19TbYi87A belongs to software Sys or z8RDo10Yrp7B2Xid3L5HcKk69Pwg4J4ZeNj30QaEb8y9F1Smn7A6Wxf2GC by i2CKd93ZoJn16Pbg8YDx05Gyz7A4WkFp8w9X4Tsm6NRc5q2MSe03BtQ.

Description: Sys.exe is not essential for Windows and will often cause problems. The file sys.exe is located in a subfolder of the user's profile folder or sometimes in a subfolder of the user's "Documents" folder or in the user's "Documents" folder. Known file sizes on Windows 10/8/7/XP are 411,136 bytes (28% of all occurrences), 25,318 bytes, 99,328 bytes or 212,992 bytes. 
The file is not a Windows system file. The software starts upon Windows startup (see Registry key: MACHINE\Run, Run, User Shell Folders, MACHINE\RunServices). There is no information about the author of the file. The program has no visible window. Therefore the technical security rating is 57% dangerous, however you should also read the user reviews.

Recommended: Identify sys.exe related errors

Important: You should check the sys.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

القرص خربان ما بفتح D
sys.exe is a process belonging to Backdoor.ICR Trojan. It is a trojan that gives remote users unauthorized access to the system. It is controlled using IRC ( Internet Relay Chat ).
  Andrew   (further information)
run in dos mode
Forces iexplorer to open causing cpu usage to reach 100% causing lagging and freezing

Summary: Average user rating of sys.exe: based on 4 votes with 4 user comments. 4 users think sys.exe is dangerous and recommend removing it. 2 users don't grade sys.exe ("not sure about it").

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Best practices for resolving sys issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active sys process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the sys.exe on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

sys.exe [all]