What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Usually, no. Microsoft does not publish evidence of a general browsing slowdown from Edge Enhanced security mode. The feature changes how Edge runs code on unfamiliar websites by disabling just-in-time JavaScript compilation and enabling additional operating-system protections. Those changes can affect certain workloads—especially WebAssembly—and Strict mode can make some sites or tasks fail. For most people, Balanced mode is the practical compromise: it protects unfamiliar sites while bypassing the extra restrictions on commonly visited sites.
What Edge Enhanced security mode actually changes
Enhanced security mode is a browser-hardening feature designed to reduce the attack surface exposed by web content. When it is active, Edge disables just-in-time (JIT) compilation for JavaScript on sites covered by the setting and turns on additional protections provided by the operating system. JIT normally converts JavaScript into machine code while a page runs; removing that compilation path makes some exploitation techniques harder, but it also changes the way certain code executes.
That mechanism is not the same as a speed optimization. Microsoft does not claim that Enhanced security makes pages load faster, and it does not publish a universal percentage slowdown for ordinary browsing. The effect depends on what a page does, which mode you select, and whether the site uses code that is sensitive to the restricted execution environment.
Why ordinary browsing may feel unchanged
Most common activities—reading articles, using ordinary forms, viewing documents, shopping, and visiting familiar services—do not necessarily depend on the code paths most affected by the feature. In Balanced mode, Edge also bypasses enhanced protections for commonly visited sites. That combination is intended to preserve the normal experience for routine destinations while applying additional defenses where Edge has less history with a site.
#1 Best Overall
- 1.1 GHz (boost up to 2.4GHz) Intel Celeron N5030 Quad-Core
Where performance can differ
Microsoft specifically warns developers that a WebAssembly (WASM) interpreter running in enhanced security mode might not deliver the expected performance. WebAssembly is a compiled-code format used by some demanding web applications, including interactive tools, games, engineering software, media applications, and other workloads that perform substantial computation in the browser. This is a workload-specific warning, not proof that every page, tab, or user will become slower.
If a site uses WebAssembly heavily, you may notice slower calculations, less responsive controls, longer waits after an action, or reduced frame rates. The documentation does not provide a general benchmark, so a precise percentage should not be assumed.
Balanced versus Strict: which mode affects compatibility more?
| Mode | How protections are applied | Likely compatibility effect |
|---|---|---|
| Balanced | Protections apply on unfamiliar sites and are bypassed for commonly visited sites. Microsoft labels this the recommended option. | Designed to preserve normal behavior on familiar destinations while adding protection on less familiar ones. |
| Strict | Protections apply to all sites by default. | More likely to interfere with usual tasks; Microsoft warns that users may have challenges and may need to configure exceptions. |
| Per-site exception | A selected site is excluded from enhanced security. | Useful when one otherwise trusted site fails under the selected mode. |
Balanced mode
Balanced is the sensible starting point for ordinary personal browsing. Edge applies enhanced protections to sites it considers unfamiliar, while commonly visited sites retain the usual web platform behavior. This limits the number of sites that need special handling and avoids imposing Strict mode’s restrictions everywhere.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →“Commonly visited” is a browser behavior rather than a promise that every site you recognize will always bypass the feature. If a familiar service is still covered by enhanced security and a function fails, use the site exception controls described below.
Strict mode
Strict applies the protections to every site by default. The broader coverage increases the chance that a page relying on JIT-sensitive JavaScript, WebAssembly behavior, or another restricted capability will behave differently. Microsoft cautions that users may report challenges accomplishing their usual tasks. Strict is therefore best suited to people who accept hands-on troubleshooting and occasional exceptions in exchange for applying the protection more broadly.
Rank #2
- 256 GB SSD of storage.
- Multitasking is easy with 16GB of RAM
- Equipped with a blazing fast Core i5 2.00 GHz processor.
How to tell whether Enhanced security is behind a problem
A compatibility issue is more plausible when a page works after you disable Enhanced security or exclude that site, but fails while the protection is active. Typical symptoms can include a control that never finishes loading, an interactive tool that becomes unresponsive, a sign-in flow that stops at a particular step, or a WebAssembly application that performs poorly. These symptoms are not proof by themselves: extensions, tracking prevention, account permissions, network filters, and site defects can produce similar results.
Start with the narrowest test. If only one site is affected, do not turn off protection globally first. Add an exception for that site, confirm whether the function returns, and keep protection enabled elsewhere. If many unrelated sites fail only in Strict mode, switching to Balanced is a broader but still targeted change.
How to add a site exception in Edge
Edge provides a per-site control for a page that does not work correctly under Enhanced security. The exact labels can vary slightly by Edge release, but Microsoft documents this path:
- Open Edge’s Settings.
- Select Privacy, search, and services.
- Find Enhance your security on the web.
- Open Manage enhanced security for sites.
- Add the site’s full URL to the exceptions list.
- Reload the affected page and repeat the task that failed.
Edge also exposes a site-level control through the Site Trust flyout. Use that control when it is available on the affected page and follow the prompt to exclude the site. An exception narrows the change to the selected destination; it does not disable Enhanced security for every site.
Use the full, correct site address
Enter the address of the site that is actually failing, including the appropriate domain and, where Edge requests it, the complete URL. A service may use separate domains for its main application, authentication, file storage, or embedded tools. Excluding one address does not necessarily exclude every related domain. Add only the domain needed for the task, because each exception reduces the protection applied to that destination.
Rank #3
- 14" diagonal, 1366x768 resolution, HD BrightView LED, Glossy NON-TOUCH Display
When an exception does not solve the problem
- Check whether the failure occurs in another browser profile or a private window with extensions disabled.
- Confirm that the problem is not caused by Tracking prevention, which has separate settings and separate compatibility trade-offs.
- Try Balanced mode if you are using Strict; Strict may be the cause even when no single site exception has been identified.
- Test the site after a full reload, since a previously loaded script can remain in a tab until it is refreshed.
- If the site is managed by an organization, ask the administrator whether policy controls the trusted or excluded domains.
Enterprise controls and managed devices
Organizations can manage trusted or excluded domains through Edge policy. On a company-managed computer, a user may be unable to add or remove an exception, or a policy may apply protections differently from the consumer-facing setting. In that situation, the administrator needs to configure the organization’s approved domains rather than asking users to repeatedly change local settings.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsPolicy behavior can also depend on the Edge version and operating system. Microsoft’s policy documentation lists support for Windows and macOS beginning with Edge version 98. Android and iOS are not supported for this policy. Those platform notes describe policy support, not a claim that every consumer interface has identical labels on every device.
WebAssembly limitations you should know
Performance warning for developers
Microsoft’s consumer documentation says that WebAssembly running in enhanced security mode might not yield the expected level of performance. Developers should therefore test computationally intensive WASM applications with the mode enabled, rather than assuming that desktop results will carry over unchanged. Users of such applications should interpret lag or slower computation as a possible mode-specific effect, while still checking other causes such as high CPU use, memory pressure, extensions, or a site-side regression.
32-bit systems
Microsoft’s policy documentation states that WebAssembly sites are unsupported on 32-bit systems when EnhanceSecurityMode is enabled. This is a compatibility limitation for that specific platform context; it should not be generalized to all systems or all WebAssembly sites. If a 32-bit Windows installation cannot run a WASM site with Enhanced security enabled, the limitation is expected behavior under the documented policy rather than evidence of a universal Edge failure.
Do not confuse Enhanced security with Tracking prevention
Enhanced security mode and Tracking prevention are separate Edge features, even though both use labels such as Balanced and Strict. Enhanced security changes how web code is executed and adds operating-system protections. Tracking prevention controls how Edge limits known trackers.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Rank #4
- 【Efficient Performance】 Powered by Intel Core i3 processor (2 cores, 4 threads, up to 3.4GHz) with 12GB RAM and 256GB SSD. Handles multitasking, office software, online classes, and HD video streaming smoothly. Integrated Intel UHD Graphics 620
- Backlit Keyboard & Complete Package】Comes with a cool backlit keyboard. Comes with awebcam, dual stereo speakers (8Ω/1.0W each), DC charger, and user manual – ready for late-night studying, online classes, video conferencing, and daily productivity
- 【Vibrant Display】 15.6-inch Full HD (1920x1080) anti-glare screen with 16:9 aspect ratio delivers crisp images and vivid colors – perfect for studying, watching lectures, or entertainment. Thin-bezel design maximizes viewing area
- 【Fast Connectivity & Expansion】 Equipped with WiFi 6 (802.11ax) and Bluetooth 5.2 for stable, high-speed wireless. Features 3 x USB 3.0, HDMI 2.1, Type-C (supports PD3.0 fast charging), and a TF card slot expandable up to 2TB – easily connect external monitors, mice, drives, or expand storage for all your files
- 【Long Battery Life & Portable】 Built-in 11.55V 5000mAh/57.75Wh high-capacity battery delivers approximately 7 hours of mixed-use battery life – enough for a full day of classes and assignments. Lightweight at just 1.63kg (3.6 lbs) and 19.5mm thin, plus a compact packing size – easily slips into a backpack for campus, library, or coffee shop
Microsoft describes Tracking prevention’s Balanced level as reducing tracking while minimizing compatibility problems. Its Strict level favors maximum privacy and can trade away website compatibility. Those statements apply to Tracking prevention, not to Enhanced security. If a site breaks after changing a privacy setting, identify which feature you changed before diagnosing the cause.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Version-specific policy details
Microsoft’s policy documentation includes several version notes that matter mainly to administrators:
- Windows and macOS policy support starts with Edge version 98.
- Android and iOS are not supported for the documented policy.
BasicModeis deprecated beginning with Edge version 113 and is treated the same asBalancedMode.BasicModedoes not work in Edge version 116.
These are policy details, not instructions to search for a deprecated consumer setting. Current consumer interfaces may present different labels, so use the settings names shown in your installed Edge version.
Should you turn Enhanced security off?
For most users, turning it off globally is unnecessary. Choose Balanced first, because it limits the extra restrictions on familiar sites while retaining protection on unfamiliar destinations. Move to Strict only if you specifically want protections applied to every site and are prepared to handle exceptions.
Consider an exception or a mode change when a necessary site fails, especially if the site is a trusted service and the failure disappears under a narrower test. Avoid broad disablement as a first response: it removes the protection from every site, including destinations you did not intend to exempt.
A practical decision sequence
- Using Strict? Switch to Balanced and retry the task.
- Only one site affected? Add that site under Manage enhanced security for sites or use its Site Trust flyout.
- WASM application affected? Check whether the application is computationally intensive and whether the system is 32-bit.
- Still failing? Test extensions, Tracking prevention, account permissions, and the site itself before blaming Enhanced security.
- Managed computer? Contact the administrator about trusted-domain policy.
Bottom line on speed and compatibility
Edge Enhanced security is not documented as causing a universal browsing slowdown, and Microsoft provides no general benchmark from which to calculate one. Its impact is workload-dependent: WebAssembly applications may not perform as expected, and Strict mode has a higher chance of disrupting ordinary site tasks because it applies protections everywhere. Balanced mode is Microsoft’s recommended compromise. When a specific site misbehaves, use a per-site exception rather than disabling the feature globally, and remember that Tracking prevention has separate settings and separate compatibility effects.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
