File Download [portable]: Roaming.lock

Windows Spotlight lock screen picture won't change - Microsoft Q&A

That said, you should open unknown files from untrusted websites as a general security rule. But if you accidentally downloaded roaming.lock , simply delete it.

When you open Firefox or Thunderbird, the application creates a small temporary file inside your user profile folder. That file is named roaming.lock . Its purpose is to tell your operating system:

If a program is looking for a roaming.lock file and can't find it, the problem is usually not that the file is missing, but that the software creating it is crashing. If the file is there and causing an error, downloading another one won't fix the permissions or corruption issues associated with the original.

Windows Spotlight lock screen picture won't change - Microsoft Q&A

That said, you should open unknown files from untrusted websites as a general security rule. But if you accidentally downloaded roaming.lock , simply delete it.

When you open Firefox or Thunderbird, the application creates a small temporary file inside your user profile folder. That file is named roaming.lock . Its purpose is to tell your operating system:

If a program is looking for a roaming.lock file and can't find it, the problem is usually not that the file is missing, but that the software creating it is crashing. If the file is there and causing an error, downloading another one won't fix the permissions or corruption issues associated with the original.