SystemRequires admin/root
Local System Temp
Windows services running under the LocalSystem account write temporary working files under %WinDir%/ServiceProfiles/LocalSystem/AppData/Local/Temp while they install updates, unpack MSI cabinets, stage logs, extract driver packages, and hand off data between service components. Over time this folder accumulates orphaned .tmp files, MSI and CAB extraction leftovers, ETL and text logs, crash dumps, and partially downloaded or abandoned setup payloads; Kudu removes only disposable temporary contents here, not service settings, accounts, passwords, or application data.
Why clean Local System Temp?
- Abandoned installer and Windows Update staging files can consume several gigabytes in the LocalSystem temp area, and users usually notice it as unexpectedly low free space on the system drive
- Partially extracted MSI, CAB, or driver package leftovers from a failed service install can be reused on the next attempt, leading to repeated update or setup failures with the same rollback behavior
- Temp folders packed with old ETL traces, crash dumps, and service logs make troubleshooting harder because fresh diagnostic files are buried among stale ones and timestamps become misleading
- Some services scan or enumerate their temp working directory during startup or maintenance jobs, so a heavily cluttered LocalSystem temp folder can show up as longer update checks or delayed service actions
- Interrupted downloads and half-written payloads left in LocalSystem temp can trigger checksum mismatches or corrupted package errors, which users see as installs that keep failing until the temp area is cleared
- Thousands of tiny orphaned temporary files increase NTFS metadata overhead and fragmentation in this service-owned workspace, which can make cleanup, backup, and antivirus scans of the system volume noticeably slower
What gets cleaned
Cache paths Kudu targets
Windows
%WinDir%/ServiceProfiles/LocalSystem/AppData/Local/Temp |
Frequently asked
Common questions about Local System Temp
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