搜索 | 用户支持

防范以用户支持为名的诈骗。我们绝对不会要求您拨打电话或发送短信,及提供任何个人信息。请使用“举报滥用”选项报告涉及违规的行为。

详细了解

This keeps popping up as a virus in Mozilla upjvuvs4.default

  • 9 个回答
  • 2 人有此问题
  • 6 次查看
  • 最后回复者为 John99

more options

When I run a virus scan this one in C:\Users\Jim\AppData\Roaming\mozilla\firefox\profiles\upjvuvs4.default-1392573684226\prefs.js pops up as a suspicious file and deletes it.

When I run a virus scan this one in C:\Users\Jim\AppData\Roaming\mozilla\firefox\profiles\upjvuvs4.default-1392573684226\prefs.js pops up as a suspicious file and deletes it.

被采纳的解决方案

If it is detecting malware in the profile it may not actually be malware it may be a false positive.

In some instance if vital files are detected from the profile Firefox will attempt to recreate them, because they are needed for Firefox to work.

Some profile content will relate to Firefox addons, and because of the Firefox Profile's purpose the actual contents will vary between installations. The omni.ja file is one particular file prone to triggering alerts. The user.js file is one that is not present by default and is sometimes created by unwanted software.

Please let us know the name of the File, we can at least say what its purpose is. Malware may of course affect the profile.

Perhaps worth considering a full scan of your system using multiple and up-to-date tools on the presumption that you could have a malware issue.


 Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

定位到答案原位置 👍 0

所有回复 (9)

more options

Which Antivirus program and version are you using?

My antivirus also checks that. I'm using Avast, so under suspicions I checked "repair" and it then gives me 2 more options to which I answered "ask" and lastly "do nothing".

more options

It is best to exclude the Firefox profile folder from scanning by security software to avoid files in the profile folder from getting corrupted or deleted.
Such warnings are usually false positives.

more options

Did you just update the definitions in your unnamed antivirus recently?

more options

I couldn't remember the full name, and it still pops up as malware and I remove it and it keeps coming back!

more options

选择的解决方案

If it is detecting malware in the profile it may not actually be malware it may be a false positive.

In some instance if vital files are detected from the profile Firefox will attempt to recreate them, because they are needed for Firefox to work.

Some profile content will relate to Firefox addons, and because of the Firefox Profile's purpose the actual contents will vary between installations. The omni.ja file is one particular file prone to triggering alerts. The user.js file is one that is not present by default and is sometimes created by unwanted software.

Please let us know the name of the File, we can at least say what its purpose is. Malware may of course affect the profile.

Perhaps worth considering a full scan of your system using multiple and up-to-date tools on the presumption that you could have a malware issue.


 Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

more options

I use Avast, Malware Bytes and Hitman Pro, HITMANPRO is the only one that picks it up and deletes it!

more options

As already advised It is probably worth adjusting regular scans and any automated cleanup not to run against the Firefox profile folders and files.

Next time it happens please let us know what it is that HitmanPro is deleting, and what message it is giving. I note HitmanPro is mentioned as using Behavioural Scan and maybe it is that generating a false positive.

Meanwhile as I said it may be worth considering using a full range of tools to scan the computer for malware.

more options

Ran hitmanpro again and it deleted two suspicious items, used Snagit 8 to capture the screen area, it's attached..

more options

If you set hitmanpro to find and delete certain cookies and it is able to do that without damaging anything then that is probably ok