"Unable to Delete Folder/Files: Require Admin Permissions?"

Windows11 Pro version 23H2 (OS build 22631.4169) is currently running on my PC, which is not connected to a domain. As the sole user with administrative privileges, I have exclusively utilized one account during the one-year lifespan of this computer.

Recently, I encountered a persistent issue stemming from Kaspersky Anti-Virus automatically installing UltraAV software due to restrictions imposed by the US Federal Government. Despite my best efforts, I have been unable to remove the approximately 700 MB of files associated with UltraAV, even with admin rights.

After tirelessly attempting to address this problem for 15 hours, including failed attempts using Windows and RevUninstaller, I am considering the drastic measure of reinstalling Windows on my OS drive, a task I am not particularly enthusiastic about.

The predicament escalated when UltraAV was not detected for removal by standard methods, leading to confusion and frustration. Even after resorting to various troubleshooting techniques suggested by sources ranging from Microsoft employees to forum threads, successful removal of the software proved elusive. Notably, dealing with registry entries in RegEdit proved challenging, as I am not an expert in registry manipulation.

Despite managing to locate the sizeable UltraAV folder on my OS drive and treating it as potentially malicious content with Malwarebytes, I found myself unable to completely eradicate the software. The inability to delete certain files and directories due to apparent permission restrictions compounded my exasperation.

Furthermore, encountering inconsistencies in permissions and file deletions across different folders within my system added to the complexity of the situation. This recurring issue of admin permissions impeding necessary actions has left me frustrated and disillusioned, especially as attempts to seek support from Kaspersky and UltraAV technical services have yet to yield tangible solutions.

Considering the minimal progress made and the relentless persistence of the problem, I am at a point of contemplating a fresh OS reinstallation as a last resort to resolve this infuriating ordeal. Any guidance, suggestions, or alternate approaches would be greatly appreciated.