Microsoft Japan Windows Technology Support published a problem that temporary folders referenced by environment variable %TEMP% or %TMP% are deleted by Disk Cleanup task (SilentCleanup mode) under certain circumstances. This problem is affecting Windows Server 2019.
This bug caused temporary folders get deleted instead of just emptying it. If the folders of the environment variables %TEMP% and %TMP% are deleted, various applications related to the temporary area won’t work.
Workaround 1: Re-login Windows again
The folders that %TEMP% and %TMP% environment variables point to are created at login. A new login solves the issue.
Workaround 2: Disable Disk Cleanup in Task Scheduling
Step 1: Start command prompt (CMD) in Administrator mode.
Step 2: Run following command:
schtasks / change / tn \ Microsoft \ Windows \ DiskCleanup \ SilentCleanup / disable
Disable SilentCleanup task in Windows Server 2019
Source
Microsoft Technet: Ask CORE: Microsoft Japan Windows Technology Support: ディスクのクリーンアップタスク (SilentCleanup) にて環境変数 %TEMP% や %TMP% に設定されているフォルダーが削除されてしまう問題について
