Be Reacquired — 2 Files Failed To Validate And Will

While the number varies, seeing a very small number of files (like 2) repeatedly usually points to one specific type of file:

If the manifest says a file should be exactly 500KB, but your file is 498KB, Steam flags it as corrupt and triggers the "reacquire" prompt. 2 files failed to validate and will be reacquired

Attempting to reacquire from source: UNKNOWN While the number varies, seeing a very small

If your antivirus isn't the issue, the second most common cause is Windows User Account Control (UAC) issues. This often happens if your Steam library is located in a protected system folder, like Program Files or Program Files (x86) . Here is the step-by-step checklist to clear it

Here is the step-by-step checklist to clear it out completely:

Reacquisition complete. Welcome home.

Steam looks at the file, sees it doesn't match the vanilla master file (because it's been modded), and flags it as broken. It then downloads the clean, original file, effectively or breaking your mod setup.