How to Remove “definst.exe”

What is definst.exe?

Originally developed by Symantec Corporation, definst.exe is a legitimate file process. This process is known as Norton Virus definition Installer and it belongs to Norton Systemworks. It is located in C:\Program Files by default.

definst.exe virus is created when malware authors write virus files and name them as definst.exe with the aim to spread virus on the internet.

Affected Platforms: Windows OS

How to determine if your computer is infected with definst.exe malware?

Look out for these symptoms to check if your PC is infected with definst.exe malware:

  • Unstable internet connection
  • definst.exe occupies extra CPU space
  • PC processing speed slows down
  • Browser often redirects to irrelevant websites
  • Browser is bombarded with hordes of popup ads
  • Computer screen freezes repeatedly

Take the following steps to diagnose your PC for possible definst.exe malware attack:

Step 1: Simultaneously press CTRL+ALT+DEL keys to open Task Manager.

Step 2: If you notice the file located outside C:\Program files, perform an antivirus scan to get rid of the malware.

How to remove definst.exe malware from system using Comodo Antivirus?

Step 1: Download our award-winning Free Antivirus

Step 2: Installation configuration frames will be displayed. Select the configuration you would like to apply.

Step 3: Select Customize Configuration option and arrange installers, configuration, and file location.

Step 4: Restart your PC after the installation gets over

Step 5: Wait for Comodo Internet Security to update the antivirus.

Step 6: Proceed with the quick scan that automatically begins after the update.

Step 7: If threats are found during the scanning, you will be notified through an alert screen.

Step 8: Comodo Antivirus will remove definst.exe malware from your computer including all other malwares!

4

Malware Entries

First Seen: 02 August 2008 at 8:25 am
No. Company File Type SHA1 MD5 Malware
Name
Digitally
Signed
File
Version
Product
Version
Submitted
From
Malware Behavior
1 Symantec Corporation Executable ee743e70e62bfac1
dbe1d1899047a372
dd6fb837
88c2298955081eab
7f18fdbcbecf7e36
Virus.Win32.
Sality.gen
No 6.6.12 6.6.12 Egypt N/A
2 Symantec Corporation Executable 235385553aa47a74
d2bec087e3a7ecb7
ea33cb56
680c0dc5e52a1f4b
8d07efc0a6df1721
Virus.Win32.
Sality.gen
No 6.6.12 6.6.12 United States N/A
3 Symantec Corporation Executable e55ee1eece4aa310
5308952381df63b4
a7ab9c21
77bf90b827228412
fceee05a800b1ae6
Unclassified
Malware
No 6.6.6 6.6.6 India N/A
4 Symantec Corporation Executable 68e5193aff5d8570
7bfc1ebf15924e55
c20dce2d
N/A Virus.Win32.
Virut.n
No 5.1.24 5.1.24 Taiwan N/A
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16

Safe Entries

First Seen: 03 June 2008 at 7:58 pm
No. Company File Type SHA1 MD5 Digitally
Signed
File
Version
Product
Version
Submitted
From
1 Symantec Corporation Executable 5de57961ac4dd2b6
2d94582f39754fa5
cf807a61
db80d0acc4bbb499
e8518504a8e57246
No 6.6.6 6.6.6 United States
2 Symantec Corporation Executable ce2067abebbe8bfd
9aa0bafb33d00672
98dca1d2
7c151cede35af9d7
9a092bc14a4a982b
No 6.6.6 6.6.6 Philippines
3 Symantec Corporation Executable 8ca471145a72a93f
0e6b82041d081884
d12a71e4
b210cec0a0a5f458
f373061fc81fecc8
No 4.00.85 4.00.85 Japan
4 Symantec Corporation Executable 0d4fa9a120cabd99
081d68f465607eab
92c95ca9
a045c86cf48c86f8
9ae6e9c06aa0ef43
No 5.1.24 5.1.24 Internal Submission
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