ผมสังเกตว่า บางครั้ง ค่อนข้างบ่อย กระบวนการ Discovery เริ่มต้นของ Windows Update ใช้เวลานานมากในการเสร็จสิ้น ขึ้นอยู่กับว่ามี Updates กี่ตัวที่ Available, นานแค่ไหน منذ Last Full Patch Cycle และ Hardware เป็นแบบไหน แต่บ่อยครั้ง ใช้เวลาที 60-90 นาที ให้คุณ List of Updates ที่คุณสามารถ Install ได้ ในช่วงเวลานั้น svchost.exe Sub-process of the WU Executable กิน Full CPU Core Worth of Processing Power หลังจากนั้น Actual Install 通常 Faster, 如果不是 Really Fast
พฤติกรรม Rather Inconsistent 和 Somewhat Annoying ของ WU Discovery นี้ Prompted Me 尝试 Find A Solution to this Issue Searches, Queries 和 Forum Questions Led Me To Two Rather Long 和 Exhaustive Threads on Wilders and DSLReports 提供 Wealth of Suggestions 和 Options With A Spare Box Awaiting Testing 我 Set About Exploring
Problem & Symptoms
在更多细节中 无论您 Just Rebooted, Manually Initiated A Check For Updates 或 Your System Runs Its Periodic Refresh WU Takes A Very Long Time To Retrieve 和 Present The Results 在一些 Cases 它可以是 Many Hours CPU 相当 Busy 在那个时间 例如 一台 Desktop ของผม ใช้ 25% CPU ประมาณ 80 分钟 Before Giving Back A List of Some 50 Odd Updates 我读过 Situations 其中它 Takes Days To Finish The Sequence
Actual Installation 是 Somewhat Faster 和 More Consistent 即使您经常 Won't See Any Percentage Change 在 Progress Bar 然后 Installation Will Be As Good As Your CPU 和 Disk Can Process The Patches After a Reboot Subsequent Checks 将显著 Faster 但 Never Immediate 取 Previous Example 一旦 50+ Updates Were Processed 和 Installed Next Check Only Lasted About Four Minutes 然而 虽然 Number of Updates Definitely Seems to Impact the Times 它不是 The Only Factor 和 That Makes The Whole Thing Rather Unpredictable
Possible Solutions
Well 有 Many Reasons 和 Workarounds Available 第一个和 Most Immediate One 是 Download the Latest Version of the WU Agent 这 Could Potentially Speed Things Up A Little 这可能是 First Check 您 Could Try
KB Fixes
有一个 Long List of Patches ที่ Released 来 Help Tackle the Issue of Update Searches 和 Installations Being Slow, Accompanied by High CPU Usage 具体地说 One of These 是 KB3102810 然而 有 Several Other Patches of the Similar Nature Released Both Before 和 After This One 例如 KB3112343, KB3138612
To Complicate Things a Little Further 这些 Patches 也似乎 Bundle Some Windows 10 Upgrade Goodies 这 Makes Them Potentially Unwanted 以及 Complicates Things When It Comes To Solving Slow Updates 加上 有 Question 哪一个 Should You Try? The Latest? The Oldest? Well Mathematically 您 Should Start With the Oldest 因为您可以 Always Upgrade, 或 Revert, 如果您遇到 Regression
我 Tested the Three KB Listed Above, With 和 Without Reboots In Between 总共 Six Permutations 我必须说 我 Have Not Been Able To Discern Any Repeatable Pattern of Improvement 或 Speed 在 This Particular Test Box CPU Still Remained Busy at 100% Most of the Time 和 Searches Took A Very Long Time 然后 我 Expanded the Testing to Another System, with Somewhat Better Results 但也有 Quite a Bit of Variation 在 Between Different Patches, Too All I Can Say 无论 Microsoft Had In Mind Probably Only Works Under Very Specific Conditions 也许甚至他们 Aren't Really Sure What Might Be Wrong 或 How 无论如何 KB Might Work 或 They Might Not 'Tis a Happy Gamble Another Patch That Might Work 是 KB3139852 和它 Might Actually Do The Necessary Magic 但我们 Will Only Be Able To Ascertain That In The Coming Months
a
结论
这是一个 Short Article, with an Unsatisfying Ending 有 Several Official Patches That Claim To Fix the Slow Update 和 Search 和 High CPU Usage 但 Whether They Work 在 Any Smart 或 Consistent Manner Is Beyond Me 我 Was Able To Achieve Only Partial Results with This Approach 我 Still Don't Have a Formula That Tells Me Exactly Under Which Conditions the WU Plays Well 和 Under Which It Crawls The Last Update May Promise Nirvana 我们 Shall See Yet
您 Might Try These Patches 您 Have Nothing To Lose 然而 Start With the Oldest Release 和 Then Move Forward in Time Make Sure You Only Perform One Change At a Time 所以您有 A Comparison Baseline 然后 Imaging 和 Backups 总是 Good Last but not the Least 在 Coming Weeks 和 Months 我们 Will Test Some Third-party Tools That Promise Speedy 和 Fun Results with Windows Updates 但 That's a Secret For Now 我们 Shall Reconvene Stay Tuned for Updates
Cheers.
