我的系统式Win7，把系统文件夹下的 Tasks 和 Software distribution 两个文件夹的权限修改一下，取消 SYSTEM 对该文件夹行驶任何权限即可！做完后系统无法后台下载任何东西。
以下是系统 Windows update 的日志，一连串严峻状况警告，抱怨“无法启动数据储存”、“无法启动自动更新”、“下载管理器紧急状况”、“竟然无法写入微软健康状况”等：
真是幸灾乐祸呀！
2015-12-25 17:23:03:090 428 a34 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 17:23:03:090 428 a34 DnldMgr Download manager restoring 0 downloads
2015-12-25 17:23:03:090 428 a34 Agent * Failed to load persisted download calls, error = 0xc8000408
2015-12-25 17:23:33:135 428 a34 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 17:23:33:135 428 a34 Agent WARNING: DeleteVolatileServices::GetServiceList failed with 0xc8000408.
2015-12-25 17:24:03:181 428 a34 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 17:24:03:181 428 a34 DnldMgr FATAL: DM:CAgentDownloadManager::RestoreDownloadJobs: GetSession failed with 0xc8000408.
2015-12-25 17:24:03:181 428 a34 DnldMgr FATAL: DM:CAgentDownloadManager::DelayedInit: RestoreDownloadJobs failed with 0x00000000.
2015-12-25 17:24:03:181 428 a34 Report WARNING: PostReboot: Failed to load cached events: 0x80070005.
2015-12-25 17:24:03:181 428 a34 Report WARNING: PostReboot: Encountered a failure in trying to initialize: 80070005. No post-reboot logging will occur.
2015-12-25 17:24:03:181 428 a34 AU ########### AU: Initializing Automatic Updates ###########
2015-12-25 17:24:33:227 428 a34 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 17:24:33:227 428 a34 Agent WARNING: GetServiceList failed with error 0xc8000408.
2015-12-25 17:24:33:227 428 a34 AU WARNING: QueryRegisteredProvider failed with error 0xc8000408
2015-12-25 17:24:33:227 428 a34 AU # AU is not configured yet
2015-12-25 17:24:33:227 428 a34 AU # Will interact with non-admins (Non-admins are elevated (User preference))
2015-12-25 17:24:33:227 428 a34 AU # Power management is turned off through policy
2015-12-25 17:24:33:227 428 a34 AU AU is not configured yet, generating timeout to launch setup wizard
2015-12-25 17:24:33:227 428 a34 AU Initializing featured updates
2015-12-25 17:24:33:227 428 a34 AU Found 0 cached featured updates
2015-12-25 17:24:33:227 428 a34 Report WARNING: CLocalEventLogWriter::Init failed = 80070005.
2015-12-25 17:24:33:227 428 a34 Report WARNING: InitReportingComponents failed: 80070005
2015-12-25 17:24:33:227 428 a34 AU WARNING: Failed to write event for AU health state:0 with error:80240004
2015-12-25 17:24:33:227 428 a34 Report WARNING: CLocalEventLogWriter::Init failed = 80070005.
2015-12-25 17:24:33:227 428 a34 Report WARNING: InitReportingComponents failed: 80070005
2015-12-25 17:24:33:227 428 a34 AU WARNING: Failed to write event for AU health state:0 with error:80240004
2015-12-25 17:24:33:227 428 a34 AU AU finished delayed initialization
2015-12-25 17:24:33:227 428 a34 Report WARNING: CLocalEventLogWriter::Init failed = 80070005.
2015-12-25 17:24:33:227 428 a34 Report WARNING: InitReportingComponents failed: 80070005
2015-12-25 17:25:03:272 428 f00 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 17:25:03:272 428 f00 DnldMgr FATAL: DM:CAgentDownloadManager::CheckAllCallDownloadStates: GetSession failed with 0xc8000408.
2015-12-25 17:25:33:318 428 f00 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 17:25:33:318 428 f00 DnldMgr FATAL: DM:CAgentDownloadManager::PurgeExpiredFiles: GetSession failed with 0xc8000408.
2015-12-25 17:26:03:364 428 f00 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 17:26:03:364 428 f00 DnldMgr FATAL: DM:CAgentDownloadManager::PurgeExpiredUpdates: GetSession failed with 0xc8000408.
2015-12-25 19:52:26:949 428 1058 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 19:52:26:949 428 1058 Agent WARNING: WU client fails CClientCallRecorder::EnumerateService with error 0xc8000408
2015-12-25 19:52:26:949 3176 608 Misc =========== Logging initialized (build: 7.3.7600.16385, tz: +0800) ===========
2015-12-25 19:52:26:949 3176 608 Misc = Process: C:\Windows\Explorer.EXE
2015-12-25 19:52:26:949 3176 608 Misc = Module: C:\Windows\system32\wucltux.dll
2015-12-25 19:52:26:949 3176 608 WUApp WARNING: Error displaying Opted In Service summary: C8000408
2015-12-25 19:53:21:956 428 1058 DtaStor FATAL: Failed to initialize datastore, error = 0xC8000408
2015-12-25 19:53:21:956 428 1058 Agent WARNING: WU client fails CClientCallRecorder::EnumerateService with error 0xc8000408
2015-12-25 19:53:21:956 3176 608 Misc =========== Logging initialized (build: 7.3.7600.16385, tz: +0800) ===========
2015-12-25 19:53:21:956 3176 608 Misc = Process: C:\Windows\Explorer.EXE
2015-12-25 19:53:21:956 3176 608 Misc = Module: C:\Windows\system32\wucltux.dll
2015-12-25 19:53:21:956 3176 608 WUApp WARNING: Error displaying Opted In Service summary: C8000408