BootUserProfileProcessingTime is very high

Question

Hi, for a few months now my machine has been taking around 10 minutes to boot. Checking event ID 100 occurrences show that the main problem is BootUserProfileProcessingTime, which takes 400-500 seconds. I can't find anything useful on this online. Here's a readout from one of these events:

Log Name: Microsoft-Windows-Diagnostics-Performance/Operational
Source: Microsoft-Windows-Diagnostics-Performance
Date: 14/02/21 13:29:14
Event ID: 100
Task Category: Boot Performance Monitoring
Level: Critical
Keywords: Event Log
User: LOCAL SERVICE
Computer: Computer
Description:
Windows has started up:
Boot Duration : 585681ms
IsDegradation : false
Incident Time (UTC) : ‎2021‎-‎02‎-‎14T00:08:22.961926600Z
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Diagnostics-Performance" Guid="{cfc18ec0-96b1-4eba-961b-622caee05b0a}" />
<EventID>100</EventID>
<Version>2</Version>
<Level>1</Level>
<Task>4002</Task>
<Opcode>34</Opcode>
<Keywords>0x8000000000010000</Keywords>
<TimeCreated SystemTime="2021-02-14T00:29:14.6281950Z" />
<EventRecordID>771</EventRecordID>
<Correlation ActivityID="{822c6642-0265-0000-fa7c-2c826502d701}" />
<Execution ProcessID="4692" ThreadID="1960" />
<Channel>Microsoft-Windows-Diagnostics-Performance/Operational</Channel>
<Computer>Computer</Computer>
<Security UserID="S-1-5-19" />
</System>
<EventData>
<Data Name="BootTsVersion">2</Data>
<Data Name="BootStartTime">2021-02-14T00:08:22.9619266Z</Data>
<Data Name="BootEndTime">2021-02-14T00:28:47.3651974Z</Data>
<Data Name="SystemBootInstance">213</Data>
<Data Name="UserBootInstance">171</Data>
<Data Name="BootTime">585681</Data>
<Data Name="MainPathBootTime">529181</Data>
<Data Name="BootKernelInitTime">230</Data>
<Data Name="BootDriverInitTime">1286</Data>
<Data Name="BootDevicesInitTime">1060</Data>
<Data Name="BootPrefetchInitTime">0</Data>
<Data Name="BootPrefetchBytes">0</Data>
<Data Name="BootAutoChkTime">0</Data>
<Data Name="BootSmssInitTime">30331</Data>
<Data Name="BootCriticalServicesInitTime">1518</Data>
<Data Name="BootUserProfileProcessingTime">465962</Data>
<Data Name="BootMachineProfileProcessingTime">296</Data>
<Data Name="BootExplorerInitTime">17987</Data>
<Data Name="BootNumStartupApps">11</Data>
<Data Name="BootPostBootTime">56500</Data>
<Data Name="BootIsRebootAfterInstall">false</Data>
<Data Name="BootRootCauseStepImprovementBits">0</Data>
<Data Name="BootRootCauseGradualImprovementBits">0</Data>
<Data Name="BootRootCauseStepDegradationBits">4</Data>
<Data Name="BootRootCauseGradualDegradationBits">0</Data>
<Data Name="BootIsDegradation">false</Data>
<Data Name="BootIsStepDegradation">false</Data>
<Data Name="BootIsGradualDegradation">false</Data>
<Data Name="BootImprovementDelta">0</Data>
<Data Name="BootDegradationDelta">0</Data>
<Data Name="BootIsRootCauseIdentified">true</Data>
<Data Name="OSLoaderDuration">4693</Data>
<Data Name="BootPNPInitStartTimeMS">230</Data>
<Data Name="BootPNPInitDuration">11318</Data>
<Data Name="OtherKernelInitDuration">574</Data>
<Data Name="SystemPNPInitStartTimeMS">11754</Data>
<Data Name="SystemPNPInitDuration">1101</Data>
<Data Name="SessionInitStartTimeMS">12993</Data>
<Data Name="Session0InitDuration">1674</Data>
<Data Name="Session1InitDuration">311</Data>
<Data Name="SessionInitOtherDuration">28345</Data>
<Data Name="WinLogonStartTimeMS">43325</Data>
<Data Name="OtherLogonInitActivityDuration">1609</Data>
<Data Name="UserLogonWaitDuration">622449</Data>
</EventData>
</Event>

I have an HP laptop with Windows 10 ver. 2004 installed.

Answer 1

Update - After some thought (and TreeSize) I managed to solve this problem by deleting a whole bunch of junk folders/files (over 60GB) in my user directory. Clearly it was straining the (rather old) hard drive.