Windows 11 Laptop Running Slow? Fixes for HP, Dell and Lenovo Laptops

If your Windows 11 laptop has slowed to a crawl, the culprit is almost never Windows itself. On HP, Dell and Lenovo machines specifically, it's usually some combination of the manufacturer's own "helper" software (HP Support Assistant, Dell SupportAssist, Lenovo Vantage) running background scans you never asked for, a hard drive that's nearly full or was never an SSD to begin with, and a stack of startup apps loading before you've even opened a browser tab. Work through Task Manager's Startup and Processes tabs first, because if the drive is a spinning hard disk or the machine shipped with 8GB of RAM or less, no amount of software tweaking will make Windows 11 feel quick.

The fixes below are ordered the way you'd actually work through them: quick checks first, brand-specific bloatware second, then the hardware truths no setting can fix.

The two-minute triage before you do anything else

Before disabling a single service, rule out the obvious. Open Task Manager (Ctrl+Shift+Esc) and look at the Processes tab sorted by CPU, then by Memory, then by Disk. If one column is pinned near 100% while the others sit idle, you've already found your bottleneck category, and everything that follows should focus there rather than everywhere at once.

Also check whether the laptop has actually been shut down recently. Windows 11's Fast Startup hibernates the kernel session rather than fully closing it, so a laptop that's only ever been put to sleep or "restarted" through a flaky update can accumulate memory leaks over days or weeks. A full shutdown (Start, Power, Shut down, not just closing the lid) clears that state. If performance improves noticeably after a proper shutdown and cold boot, the issue was accumulated cruft, not a fundamental hardware limit.

OEM bloatware: the part that's actually specific to your brand

This is where HP, Dell and Lenovo laptops diverge from a generic Windows 11 slowdown, and it's the detail most generic troubleshooting guides skip because they're written without ever having opened one of these tools. Every major OEM preloads a support suite that phones home, checks for driver updates, and in some cases runs a background telemetry or optimisation service continuously. None of it is malware, but none of it is free either, in CPU cycles or RAM.

The bigger offender on all three brands is usually the bundled security suite trial, McAfee LiveSafe on HP and Dell, or Norton 360 on some Lenovo configurations. These run a full disk scan on a schedule you didn't set, and the free trial nags you with pop-ups that themselves consume resources rendering. If you're already covered by Windows Security (Microsoft Defender), which Which? and AV-Comparatives testing has consistently rated as effective as most paid suites for typical home use, uninstalling the trial software via Settings > Apps > Installed apps removes both the scan overhead and the pop-up nagging in one step.

Startup apps and background processes

Windows 11 separates these into two lists that people conflate: Settings > Apps > Startup (things that launch when you log in) and Settings > Apps > Installed apps, where each app has a "Background apps permissions" toggle for running after you close it. Both matter.

Open Settings > Apps > Startup and look at the "Startup impact" column Windows already calculates for you. Anything marked High that you don't use daily, printer utilities, Bluetooth companion apps for headphones you're not wearing right now, cloud storage clients you've since abandoned, can be switched off without any downside. This alone often recovers a genuinely slow login-to-usable time, because these apps compete for disk I/O during the exact window your laptop's SSD or HDD is also trying to load Windows's own core services.

OneDrive deserves its own mention here because it's easy to miss as a cause. If Known Folder Move is enabled (it often is by default on OEM-configured Windows 11 installs), your Desktop, Documents and Pictures folders are being continuously synced to the cloud. On a laptop with a large photo or video library and a modest broadband upload speed, this shows up as constant background disk and network activity that has nothing to do with anything you're actively doing. Check via the OneDrive cloud icon in the system tray, Help & Settings, Settings, Backup, and either pause syncing temporarily or move large media folders outside the synced set.

Storage is usually the real bottleneck, not the processor

This is the fix most people skip because it doesn't feel like a "settings" problem, but it's the single biggest lever on an older HP, Dell or Lenovo laptop. If Task Manager showed Disk usage pinned at 100% during the triage step above, this section is for you.

Windows 11's official minimum specification calls for 64GB of storage, but Microsoft's own guidance and independent testing agree that a Windows 11 install with updates, a browser cache and a handful of apps needs meaningfully more headroom than the bare minimum to avoid the OS constantly juggling virtual memory on a nearly-full drive. As a working rule, once free space drops below roughly 15-20% of total capacity, both HDDs and SSDs slow down noticeably because the drive controller has fewer contiguous free blocks to write to.

The bigger issue is drive type itself. A budget HP, Dell or Lenovo laptop from before around 2018-2019 frequently shipped with a 5,400rpm mechanical hard drive rather than an SSD, and Windows 11's background processes (Windows Update, Search indexing, antivirus scanning) simply weren't designed against that kind of latency.

If Disk Management (right-click Start, Disk Management) shows Disk 0 as a HDD, cloning it to a SATA or NVMe SSD using a free tool like Macrium Reflect Free, then swapping the drive, is the single most effective performance fix available on an ageing laptop, more effective than any registry tweak or driver update. Most HP, Dell and Lenovo consumer laptops from the last decade have a user-accessible bottom panel; check the exact model's service manual before opening the case, since a small number of ultra-thin models (certain Dell XPS and HP Spectre lines) solder storage to the board.

RAM: check before you assume you can upgrade it

The other genuine hardware fix is memory, but this is where a lot of advice online is outdated for current-generation thin-and-light laptops. Many recent HP, Dell and Lenovo models, particularly 13-14 inch ultraportables using LPDDR4X or LPDDR5 memory, have RAM soldered directly to the motherboard specifically because that memory type has to sit close to the processor to hit its rated speed. There's no SO-DIMM slot to open.

Before ordering RAM, check the exact configuration using the laptop's identifying number: Dell's 7-character Service Tag (usually on the base or in Dell SupportAssist), HP's serial number (via HP Support Assistant or the base label), or Lenovo's serial (via Lenovo Vantage or the base label). Enter it on the manufacturer's own support site under "Specifications" or "Memory" rather than relying on generic model-name searches, since the same model name is often sold in multiple RAM configurations.

If it is upgradeable and you're currently on 8GB, moving to 16GB is worth it if you regularly have a browser with 15+ tabs, Teams or Zoom, and an Office app open simultaneously; Windows 11's own background footprint (Widgets, Search indexing, WMI, Defender) sits noticeably higher than Windows 10's did on the same hardware, so the margin that used to be comfortable at 8GB has narrowed.

Windows Update, drivers and the 24H2 search indexing issue

If you've ruled out storage, RAM and bloatware and the laptop still has intermittent spikes, particularly a process called SearchHost.exe or SearchIndexer.exe pinning a CPU core, check which Windows 11 feature update you're on via Settings > System > About. Following the rollout of the 24H2 update, a search indexing bug causing sustained high CPU usage was widely reported on Microsoft's own Feedback Hub and community support forums; Microsoft addressed elements of it through cumulative updates, so confirming you're fully patched via Settings > Windows Update, rather than assuming a single past update fixed it, is worth the two minutes it takes.

Outdated chipset and graphics drivers cause a related but distinct symptom: general sluggishness that's worse after waking from sleep. Update these through the OEM tool (HP Support Assistant, Dell Command Update, or Lenovo Vantage's driver section) rather than generic Windows Update, since manufacturer-specific chipset drivers for power management often lag behind what Windows Update offers.

Power settings are quietly throttling more laptops than people realise

Windows 11 replaced the old power plan dropdown with a slider under Settings > System > Power & battery, Power Mode: Best power efficiency, Balanced, or Best performance. On battery power, many OEM configurations default to Best power efficiency, which caps CPU boost clocks to save battery life, and some HP and Lenovo models carry this default even while plugged in. If the laptop feels sluggish specifically during CPU-heavy tasks like video calls or exporting a document with embedded images, check this setting is on Best performance while mains-powered before assuming it's a hardware limitation.

When to stop tweaking and reset or upgrade instead

If you've worked through bloatware, startup apps, storage headroom and drivers and the laptop is still slow, the honest answer depends on age and specification rather than further settings changes.

Reset this PC (Settings > System > Recovery > Reset this PC, choosing "Keep my files") reinstalls Windows 11 clean while leaving personal files intact, removing accumulated background cruft, orphaned services and registry bloat that built up over months of app installs and uninstalls. It's a genuinely different fix from the software tweaks above because it removes things you can't easily find and disable individually, rather than managing around them.

What actually made the difference, in order

Across HP, Dell and Lenovo laptops, the fixes above rarely need to be applied all at once, and doing them in the wrong order wastes time. Start with a proper shutdown and Task Manager triage, move to disabling OEM scan schedules and startup apps, then judge honestly whether the drive is an HDD. If it is, that single swap will outperform every software change combined. RAM and driver updates matter, but they're refinements on top of a machine that already has a fast drive and a clean startup list, not a substitute for one.

Related Guides

Why Is My Laptop So Slow? A UK Guide to Fixing It Fast

Why Your Computer Is Running Slow (And the Fixes That Actually Work)

No Sound on Windows 11 Laptop? How to Fix Audio Driver Issues

Laptop Won't Connect to Wi-Fi? Fixes That Actually Work