Exterminate It! Antimalware


Known threats:700,085 Last Update:March 01, 12:55


I consider myself pretty good with a computer, but after 10 hours of trying to do this myself, the sysguard.exe whipped me. I couldn't find all the files and when I thought I had them all, they would replicate and play hide and go seek I have never endorsed a product in a comment, but if you want to rid yourself of this stuff, pay the $24.99 and download Exterminate-It It fixed my system in 5 minutes!

Mike T.

File: appcompat.txt

Location of appcompat.txt and Associated Malware

Check whether appcompat.txt is present in the following locations:

Windows 2000, Windows XP, Windows Server 2003 specific appcompat.txt file locations:

  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\wer51.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\wer53.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER66.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER61.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER57.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER5A.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER55.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER63.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER5B.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER6A.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER5E.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER65.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER68.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER60.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER54.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER5D.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER64.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER62.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER58.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER59.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER69.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER56.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER67.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER5C.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\WER5F.tmp.dir00\appcompat.txt
  • C:\Documents And Settings\USER_NAME\Local Settings\Temp\appcompat.txt

Windows Vista, Windows Server 2008, Windows 7, Windows 8 specific appcompat.txt file locations:

  • C:\Users\USER_NAME\AppData\Local\Temp\wer51.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\wer53.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER66.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER61.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER57.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER5A.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER55.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER63.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER5B.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER6A.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER5E.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER65.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER68.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER60.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER54.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER5D.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER64.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER62.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER58.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER59.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER69.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER56.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER67.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER5C.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\WER5F.tmp.dir00\appcompat.txt
  • C:\Users\USER_NAME\AppData\Local\Temp\appcompat.txt

If you find appcompat.txt file in any of these locations, your computer is very likely to be infected with the following malware:

IMPORTANT: Malware files can be camouflaged with the same file names as legitimate files. The appcompat.txt file is associated with malware only if found in the locations listed above.


Different Variations of appcompat.txt File^

File SizeFile Md5Last Seen
13328485F2C4388B7365CE5110A0CB6125FCAFeb 24, 2010
118542F99E9D94B2FD68402689EDE25E530F8Mar 13, 2010
1826692399BE51EC8F78506E6B81865E78727Apr 14, 2010
3361453C8201F1DDAEF9C48F61CA8EE0872EFDec 23, 2009
168888584FA5DEA99F6E1AF579B8736E4E39CMar 13, 2010
27072F688EE840B8B3E8AD5CCCA535E8940A7Mar 13, 2010
8486F04FE6348E388C3B6B2B740BD82A788AMay 2, 2010
516615289DAADC16AB5F091E8E465218BF80Dec 23, 2009
15090462AEA34E4D7900DBA1943843E88E6B6Jan 10, 2010
255203E3CC0A834123D6664ECB8F713ABAF97Mar 13, 2010
1018265F3A84639D4DEB483BB45DC22300022Mar 13, 2010
42078A08251DB02682735F1C5983006614804Mar 13, 2010
8302F3B347E0AA1AAE37A98AAD99EA512342Mar 24, 2010
390384C8983C6677B01B42378908FCC6901216Dec 24, 2009
22870589624CC36F4F4437C13FA10C7CCABFeb 24, 2010
13228603E1F203E6D43FA7413D88E1DEED424Mar 24, 2010
390792709D4757EF709BD52235E4B89815DBDAJan 28, 2010
236280358A8D98AAEEBFA0EA6C1A2F2632620Mar 13, 2010
31976AA975A5C5DEB2D33136330A97111301EMar 16, 2010
2417825D915FDBD7DE628103542F52069590BDec 24, 2009
13556B95A947873856BF18F55A4219E25604EMar 13, 2010
252460F5B4C7906DBFFD17BD3BD9BB210B74Feb 24, 2010
3486EAF2C7C98227132E1359C4A8ECCBF9A2Feb 3, 2010
52044F322A8F77A79B2DE5F20FD0BB88B63EMar 13, 2010
3501685AF6E25D0D1278FF773C14DD7954AC1Apr 9, 2010
2886232EC5E15B88D85BCEBB3C9BC719D9717Dec 23, 2009
31944C9E09CCA7BCE06A041A1EBC02ADDD70BDec 30, 2009
224D2F7BDA1FF580E0D639A4B619DB2C7A3Jan 17, 2010
108445E5BE00B13118C9809C771EB9E121256Dec 24, 2009
303360FEC8ED73878DA2173606BA975347339Feb 3, 2010
5280C311BCBC931E9D4218AB69110551C538Feb 3, 2010
223242BFD7F51AE31FF792FE712EAC7D0A76C8Feb 16, 2010
15222FE5E890FB527A7C6AB355E25681D147EMar 13, 2010
4400B47B48E201A8D8D1B9D4EE2FB61C3627Apr 6, 2010
6870EBFCDC101B716DABFB2367BE5326FB65Apr 24, 2010
274141F933B3681288FCEF5338919A1C123E1Mar 13, 2010
144962B4E7F43E36DB525BFB08EC54CBAD8F1Apr 14, 2010
288849D64E8E0336A3F291E3310D644884089Dec 19, 2009
600421B20931955C1E2CC3CA667A7B68A4A0FJan 9, 2010
2653163281DB0BB09344E654D488336D6FA8F2Feb 16, 2010
63871F020F6AD05791B5A60771631467C40Feb 24, 2010
2110F937B4A33BEA3220BFE075724D951BE9Feb 24, 2010
2174814C1D433FAF96F4DAF006FFEFD7A6683Apr 14, 2010
98468C3A2F2BDA49E42B1CDEF512F68E9271Mar 25, 2010
35808E3E8CA02FFC585CEDF15175C6447C648Dec 23, 2009
246165C835540AA8BCAB3CEE0CFA6093679CEJan 10, 2010
16488C60F45D78275D763418639F0011EF3B9Apr 4, 2010
4902424C0DF7E355AF6373822B188748574E9Mar 16, 2010
303949B11FA5DEB09843A7957A2E88C66A2A5Feb 22, 2010
627625EF66A31EACE5C96BBC7C6211623C3E2Mar 8, 2010
854056725C55379EC8F693E35FE259716F8DMar 13, 2010
3022686715D7029627DA046C0744F576958CEMar 16, 2010
39374C0B899167013001B6E8CAD680FE000E2Apr 29, 2010
37212B15FD639B1639E52A668E9C226802CD2Jan 12, 2012

Why Is It Important to Remove Malware Files?^

It is imperative that you delete malware-associated files as soon as possible because they can be used - or are already being used - to inflict serious damage on your PC, including:

  • Disrupting the normal functioning of the operating system or rendering it completely useless.
  • Hijacking valuable private information (credit card numbers, passwords, PIN codes, etc.)
  • Directing all your Web searches to the same unwanted or malicious sites.
  • Dramatically slowing down your computer.
  • Gaining total control of your PC to spread viruses and trojans and send out spam.

How to Remove appcompat.txt^

  1. To enable deleting the appcompat.txt file, terminate the associated process in the Task Manager as follows:
    • Right-click in the Windows taskbar (a bar that appears along the bottom of the Windows screen) and select Task Manager on the menu.
    • In the Tasks Manager window, click the Processes tab.
    • On the Processes tab, select appcompat.txt and click End Process.
  2. Using your file explorer, browse to the file using the paths listed in Location of appcompat.txt and Associated Malware.
  3. Select the file and press SHIFT+Delete on the keyboard.
  4. Click Yes in the confirm deletion dialog box.
  5. Repeat steps 2-4 for each location listed in Location of appcompat.txt and Associated Malware.
  6. Notes:

    • The deletion of appcompat.txt will fail if it is locked; that is, it is in use by some application (Windows will display a corresponding message). For instructions on deleting locked files, see Deleting Locked Files.
    • The deletion of appcompat.txt will fail if your Windows uses the NT File System (NTFS) and you have no write rights for the file. Request your system administrator to grant you write rights for the file.

Deleting Locked Files^

You can delete locked files with the RemoveOnReboot utility. You can install the RemoveOnReboot utility from here.

After you delete a locked file, you need to delete all the references to the file in Windows registry.

To delete a locked file:

  1. Right-click on the file and select Send To -> Remove on Next Reboot on the menu.
  2. Restart your computer.

The file will be deleted on restart.

Note: In the case of complex viruses that can replicate themselves, malware files can reappear in the same locations even after you have deleted those files and restarted your computer. Exterminate It! Antimalware can effectively eradicate such viruses from your computer.

To remove all registry references to a appcompat.txt malware file:

  1. On the Windows Start menu, click Run.
  2. In the Open box, type regedit and click OK. The Registry Editor window opens.
  3. On the Edit menu, select Find.
  4. In the Find dialog box, type appcompat.txt. The name of the first found registry value referencing appcompat.txt is highlighted in the right pane of the Registry Editor window.
  5. Right-click the registry value name and select Delete on the menu.
  6. Click Yes in the Confirm Value Delete dialog box.
  7. To delete all other references to appcompat.txt, repeat steps 4-6.
IMPORTANT: Malware files can masquerade as legitimate files by using the same file names. To avoid deleting a harmless file, ensure that the Value column for the registry value displays exactly one of the paths listed in Location of appcompat.txt and Associated Malware.