Windows gets dangerous when you disable these 6 features

Published Oct 26, 2026, 12:30 PM EDT Tony Phillips is an experienced Microsoft Office user with a dual-honors degree in Linguistics and Hispanic Studies. Prior to starting with How-to Geek in January 2024, he worked as a document producer, data manager, and content creator for over ten years, and loves making spreadsheets and documents in his spare time. Tony is also an academic proofreader, experienced in reading, editing, and formatting over 3 million words of personal statements, resumes, reference letters, research proposals, and dissertations. Before joining How-To Geek, Tony formatted and wrote documents for legal firms, including contracts, Wills, and Powers of Attorney. Tony is obsessed with Microsoft Office! He will find any reason to create a spreadsheet, exploring ways to add complex formulas and discover new ways to make data tick. He also takes pride in producing Word documents that look the part. He has worked as a data manager in a secondary school in the UK and has years of experience in the classroom with Microsoft PowerPoint. He loves to encounter problems in Microsoft Office and use his expertise and legal-level training to find solutions. Outside of the Microsoft world, Tony is a keen dog owner and lover, football fan, astrophotographer, gardener, and golfer. Windows has a habit of getting in your way just when you're trying to get something done. Whether it's an update at the wrong time or a driver that refuses to cooperate, you might be tempted to disable a security feature and call it a day. Before you do, though, there are six Windows features you should think twice about switching off. Everything here is based on Windows 11, so things may look a little different on other versions. Microsoft Defender Antivirus Handle suspected false positives without dropping your guard Defender has a knack for flagging trusted files and tripping up legit apps. Switching off real-time protection might seem tempting, but it leaves files you open or download without the same immediate checks for threats. You can check that Real-time protection is enabled under Windows Security > Virus & threat protection > Manage settings. Instead, play detective. Check where the file came from, investigate whether it's malicious, and look for an updated version if Defender repeatedly flags an app. If you're sure a file is safe, you can add a narrow exclusion under Windows Security > Virus & threat protection > Manage settings > Exclusions > Add or remove exclusions. Defender won't check excluded items during real-time scanning, so avoid excluding whole folders, file types, or processes. A targeted exclusion is safer than turning off all protection. User Account Control Keep surprise changes in check User Account Control (UAC), found under Control Panel > User Accounts > Change User Account Control settings, can feel like an interruption when you're installing software or making changes to your PC. If you're constantly approving prompts, it's tempting to lower the notification level or select "Never notify" to suppress them altogether. Those prompts let you question whether an app deserves permission to change your PC. With UAC disabled, programs running under an administrator account can make changes without approval. For a balance between convenience and security, leave UAC at its default: Notify me only when apps try to make changes to my computer. Pay attention to unexpected prompts: approve them when you've deliberately launched an administrative tool, but deny them if you don't know why an app needs permission. Avoid routinely running everyday apps as an administrator. Microsoft Defender Firewall Fix connection problems without opening the floodgates Windows Firewall (Windows Security > Firewall & network protection) can get in the way when a game won't connect or an app can't communicate with another device. Turning it off might seem like the quickest fix when you're troubleshooting connection problems. The trouble is that disabling it removes a layer of protection against unwanted connections. Windows blocks unsolicited incoming connections that don't match an app allow rule, while allowing outgoing connections unless blocked. Instead of switching off the firewall, track down the connection that's failing. Under Windows Security > Firewall & network protection > Allow an app through firewall, check whether Windows has blocked the app and whether it's allowed on the correct network profile. Only allow the network profiles an app needs, and be cautious on public networks. Don't leave your PC exposed just because one program is being difficult—see Microsoft's explanation of the risks of allowing apps through Windows Firewall first. Windows Update Pause updates briefly; don't switch them off Windows updates can arrive at inconvenient times, introduce bugs, or change features you rely on. It's tempting to stop Windows from installing anything else, but disabling updates entirely leaves known security vulnerabilities unpatched, giving attackers opportunities Microsoft has already worked to close. A better approach is Windows' built-in Pause updates option (Settings > Windows Update), which buys you some breathing room. Windows 11 limits how long updates can remain paused, so don't treat this as a permanent escape route. Remember that pausing updates can also delay security fixes, so resume updating as soon as you're comfortable doing so. If an update has already caused problems, check Microsoft's release-health information for known issues and available fixes. You can also schedule restarts around your working hours. The goal is to control when updates interrupt you, while still getting the security fixes you need. Memory integrity Fix driver problems before sacrificing protection Memory integrity, found under Windows Security > Device security > Core isolation details, uses virtualization-based security to protect parts of Windows from malicious or vulnerable kernel-mode code. Unfortunately, it doesn't always play nicely with incompatible drivers or software. You might notice a device malfunctioning, an app misbehaving, or Windows warning you about an incompatible driver. Turning off Memory integrity might solve the immediate issue, but it removes protection against malicious code compromising the Windows kernel. Before disabling it, identify the driver causing the warning and check the hardware manufacturer's website for an updated version. If no compatible driver is available, weigh how much you need the affected device against the security trade-off. Performance can also vary with your hardware, so measure any actual slowdown rather than assuming the feature is responsible. On compatible systems, keeping Memory integrity enabled is the safer choice. Device Encryption Protect your files without losing your recovery key Device Encryption helps protect your files if your laptop is lost or stolen. It's available on supported devices running Windows Home and other Windows editions, and you can find it under Settings > Privacy & security > Device encryption. That protection can feel like a nuisance when you're troubleshooting startup problems, changing hardware, or trying to recover a PC. Turning encryption off removes protection for data stored on the drive. Instead, make sure your recovery key is backed up before you need it. If your recovery key was backed up to your Microsoft account, you can find it on Microsoft's BitLocker recovery keys page. Keep the key private, and make sure you can access it from another device if your PC becomes unavailable. For planned maintenance that might trigger a recovery prompt, follow Microsoft's or your device manufacturer's instructions for the specific procedure. Where supported, temporarily suspending protection is different from decrypting the entire drive. Don't turn off encryption as a routine troubleshooting shortcut. Keep your security settings working for you Windows security features can occasionally get in the way, especially when you're troubleshooting a stubborn app, driver, or update. But switching them off for good can leave your PC open to problems you could easily have avoided. When you need to change a setting, make the smallest adjustment that solves the issue, keep it temporary where possible, and restore protection as soon as you can. If the same feature keeps causing trouble, dig into the underlying cause instead of settling for a permanent security compromise.