A File-Level Restore of any Windows archive in vRanger starts, and attempts to mount the disk(s) in the archive to the currently logged-in user's profile. The mounting phase never completes or errors-out; instead, vRanger is "stuck" in the "Loading..." phase (pre disk-mount). The application then becomes completely unresponsive and must be closed via the Windows Task Manager. What is very peculiar about this problem, is that an FLR of the SAME archive may have worked a few times before, but when this problem manifests, NO archives can mount in the FLR.
Certain virus scanning applications have an "on-access" scan feature with a heuristics engine running in the background that checks for "suspicious" application behavior. Due to the repetetive file-access behavior of the vRanger back-end toolset that needs to run in the application, several antivirus products (known: ESET Antivirus, Symantec Endpoint Protection, and Sophos Anti-virus -- however, other AV products may also cause the issue) mistake vRanger for "malware" or a virus. This causes them to block the tools from running, and ultimately hangs the application.
1) "White-list" (omit from the on-access heuristics scan) the vRanger install directory and all subdirectories. The "on-demand" or scheduled virus scans may still scan these folders.
2) After this is done, re-try the FLR. It now should work normally.
3) Since the way the heuristics scanning works differs in each AV application, additional steps to disable the on-access scanning may be necessary, so some experimentation may be needed.