Hi. Somehow I have some KES10 Files on my D Drive (NTFS) which I can not delete. These Files are not from any actual installation, I setup the system with Win10 on Drive C: where I installed the actual KAV2020. On Drive D are only Files from old/last Windows installation. I tried to set all permissions to user to delete the file and tried it via CMD but can not delete these files! D:\___alles\DOWNLOADS>rmdir /s "not_deleteable" not_deleteable, Are you sure (Y/N)? y not_deleteable\fgfgfg\All Users\Kaspersky Lab\KES10\Data\Updater\Temporary Files\temporaryFolder\bases\apu\ForDiff\apu0013.dat.bca - The process cannot access the file because it is being used by another process. not_deleteable\fgfgfg\All Users\Kaspersky Lab\KES10\Data\Updater\Temporary Files\temporaryFolder\bases\apu\ForDiff\apu0049.dat.bca - The process cannot access the file because it is being used by another process. not_deleteable\fgfgfg\All Users\Kaspersky Lab\KES10\Data\Updater\Temporary Files\temporaryFolder\bases\av\kdb\i386\ForDiff\base172c.kdc.bca - The process cannot access the file because it is being used by another process. not_deleteable\fgfgfg\All Users\Kaspersky Lab\KES10\Data\Updater\Temporary Files\temporaryFolder\bases\av\kdb\i386\ForDiff\base84bc.kdc.bca - The process cannot access the file because it is being used by another process. not_deleteable\fgfgfg\All Users\Kaspersky Lab\KES10\Data\Updater\Temporary Files\temporaryFolder\bases\av\kdb\i386\ForDiff\ext199c.kdc.kbb - The process cannot access the file because it is being used by another process. not_deleteable\fgfgfg\All Users\Kaspersky Lab\KES10\Data\Updater\Temporary Files\temporaryFolder\bases\ksn\ForDiff\klsrl2.dat.jbc - The process cannot access the file because it is being used by another process. not_deleteable\fgfgfg\All Users\Kaspersky Lab\KES10\Data\Updater\Temporary Files\temporaryFolder\bases\wmuf\ForDiff\wmuf0002.dat.bca - The process cannot access the file because it is being used by another process. Interesting is that Windows says: The process cannot access the file because it is being used by another process. ???? these files are only trash from old installation how can they be used by another process?? Any ideas how to get rid of it ?! thx //Mod Note: moved to the correct section.