The fastest way to speed up startup is to disable programs that load automatically when Windows or macOS starts
Your computer runs dozens of programs in the background before you even see the desktop. Each one adds seconds to startup time. The single most effective change is to stop the ones you do not need running from the moment you turn on your machine.
On Windows 10 or 11, open Task Manager by pressing Ctrl+Shift+Esc, then click the Startup tab. You will see a list of programs with a Status column showing Enabled or Disabled. Right-click any program you do not use daily — Spotify, Discord, Slack, Adobe Creative Cloud, antivirus updaters — and select Disable. Restart your computer to see the difference. Most people can disable 10 to 20 programs without losing anything they need.
On macOS, go to System Settings, then General, then Login Items. Remove programs from the "Allow in the Login Window" list by clicking the minus button. The effect is the same: fewer things loading means faster startup.
Key Takeaways
- Disabling startup programs in Task Manager (Windows) or Login Items (macOS) usually cuts startup time by 30 to 60 seconds with no risk.
- A full disk — especially one over 90 percent full — slows startup because Windows and macOS cannot write temporary files efficiently; freeing 10 to 20 gigabytes often helps noticeably.
- Older hard drives (HDD) are the single biggest cause of slow startup; replacing one with a solid-state drive (SSD) cuts startup time from 45 seconds to under 10 seconds but costs $50 to $150 and requires installation.
- Malware and viruses can hijack startup, so running a full scan with Windows Defender (Windows) or Malwarebytes (both systems) should happen before you assume hardware is the problem.
- Turning off visual effects like animations and transparency in Windows Settings has a small effect on older machines but rarely fixes a slow startup on its own.
Check how much disk space you have left
Windows and macOS both need free space to run smoothly. When your drive is more than 90 percent full, the operating system slows down because it cannot write temporary files, cache, or updates. Startup is one of the first things to suffer.
On Windows, right-click your C: drive in File Explorer and select Properties. Look at the pie chart — if the blue section (used space) takes up most of the circle, you need to free space. On macOS, click the Apple menu, select About This Mac, then Storage. If you see less than 10 to 20 gigabytes free, you are too full.
The fastest way to free space is to delete old files you do not need, empty your Downloads folder, and uninstall programs you no longer use. If you have large video or photo files you rarely access, move them to an external drive or cloud storage. Clearing 20 to 30 gigabytes often produces a noticeable startup improvement on a nearly full drive.
Replace a mechanical hard drive with a solid-state drive
If your computer is more than five years old and still has a traditional hard drive (HDD), that is almost certainly why startup takes 45 seconds or longer. Mechanical drives are slow by design — they have spinning platters and a moving read head, which takes time. A solid-state drive (SSD) has no moving parts and reads data when ready.
Replacing an HDD with an SSD is the single most dramatic upgrade you can make. Startup time typically drops from 45 to 60 seconds to 8 to 15 seconds. A 500-gigabyte SSD costs $40 to $70; a 1-terabyte drive costs $60 to $150. Installation requires opening your computer case, which takes 15 to 30 minutes if you are comfortable with hardware, or $50 to $100 if you take it to a repair shop.
If you are not sure whether you have an HDD or SSD, open Task Manager on Windows and look at the Processes tab while your computer is starting up. If the Disk column shows 100 percent for several seconds, you have a mechanical drive. On macOS, hold Option and click the System menu, then System Information, then Storage — it will say either "Solid State Drive" or "Hard Drive".
Scan for malware and viruses
Malware and viruses often hijack your startup process to run themselves before anything else loads. This can add 30 seconds or more to startup time and is harder to spot than a slow hard drive because the computer looks normal once it finishes starting.
Run a full scan with Windows Defender, which is built into Windows 10 and 11. Open Windows Security, click Virus & threat protection, then Scan options, then select Full scan. This takes 30 minutes to an hour but checks every file on your computer. If Windows Defender finds nothing, read Malwarebytes (free version) and run a full scan with that as well — it catches some threats Windows Defender misses.
On macOS, Malwarebytes is the most reliable option. read it, run a full scan, and let it remove anything it finds. macOS has built-in protections that catch most malware, but a manual scan is worth doing if startup is mysteriously slow and nothing else explains it.
Turn off visual effects on older Windows machines
Windows includes animations, transparency effects, and shadow rendering that look polished but consume resources. On a computer with an older processor or less than 8 gigabytes of RAM, disabling these effects can shave a few seconds off startup.
Open Settings, then System, then About. Scroll down and click Advanced system settings. In the System Properties window, click the Advanced tab, then click Settings under Performance. Select "Adjust for best performance" to turn off all visual effects at once, or uncheck individual items like "Animate windows when minimizing and maximizing" and "Show shadows under mouse pointer" if you want to keep some effects.
This change is most noticeable on computers from 2015 or earlier. On newer machines with solid-state drives and 8 gigabytes or more of RAM, the difference is usually under 5 seconds and not worth the trade-off in how Windows looks.
Update your operating system and drivers
Microsoft and Apple release updates that sometimes improve startup performance, especially if your computer is running an older version of Windows or macOS. Updates also patch security holes that malware exploits to slow down startup.
On Windows 10 or 11, open Settings, then Update & Security (or System > Windows Update on Windows 11), then click Check for updates. Let Windows read and install any available updates, then restart. On macOS, click the Apple menu, then System Settings, then General, then Software Update. Install any updates and restart.
Driver updates — especially for your graphics card and chipset — can also help. On Windows, right-click the Start button, select Device Manager, and look for any devices with a yellow warning triangle. Right-click those devices and select Update driver. For graphics cards, visit NVIDIA.com or AMD.com directly and read the latest driver for your specific card model.
Check your RAM and consider adding more
If your computer has less than 4 gigabytes of RAM, it will slow down during startup because the operating system cannot load everything it needs into memory. It has to use your hard drive as temporary storage, which is much slower.
On Windows, right-click This PC or My Computer and select Properties. Look for "Installed RAM" — if it says 2 GB or 4 GB, that is likely your bottleneck. On macOS, click the Apple menu, then About This Mac, then Memory. If you see 4 GB or less, adding RAM will help.
Adding RAM costs $30 to $80 for 8 gigabytes and takes 10 minutes if you are comfortable opening your computer, or $30 to $50 if you have a repair shop do it. This is less dramatic than an SSD upgrade but still produces a noticeable improvement on older machines. If you have 8 gigabytes or more, adding more RAM will not speed up startup.
Frequently Asked Questions
How much faster will my computer start if I disable startup programs?
Most people see a 30 to 60 second improvement, sometimes more. The exact amount depends on how many programs you had loading automatically. Disabling 15 to 20 programs is common and usually cuts startup time by half.
Is it safe to disable programs in the Startup tab?
Yes. Disabling a startup program does not uninstall it — it just stops it from loading when you turn on your computer. You can still open the program manually whenever you need it. The only programs you should be cautious about are security software like antivirus, which some people prefer to keep running at startup.
Will clearing my Downloads folder really speed up startup?
Only if your drive is very full — over 90 percent. If you have plenty of free space, clearing Downloads will not change startup time. But if you are running low on disk space, freeing 20 to 30 gigabytes can make a noticeable difference.
What is the difference between an HDD and an SSD?
An HDD (hard disk drive) has spinning platters and a moving read head, like a record player. An SSD (solid-state drive) has no moving parts and stores data on flash memory chips. SSDs are 5 to 10 times faster at reading data, which is why startup is so much quicker on an SSD.
Do I need to replace my hard drive or can I just add an SSD?
You can do either. If your computer has room for a second drive, you can add an SSD and move your operating system to it, keeping your old drive for storage. If you only have room for one drive, you will need to replace the HDD with an SSD, which means backing up your files first or paying a technician to do the transfer.