There’s nothing more frustrating than a sluggish PC, especially when you’re trying to work with essential productivity tools like Windows 10 Professional + MS Office 2019 Pro Plus. While both platforms are designed for speed and efficiency, several common issues can cause your system to slow down over time. The good news? You don’t need to be an IT expert to fix them.

In this comprehensive guide, we’ll break down the top seven fixes that can help you bring your Windows 10 Pro system and Office 2019 installation back to peak performance. From startup optimization to deep cleaning your system and disabling unnecessary background processes, these steps are practical, proven, and easy to follow.

1. Disable Unnecessary Startup Programs

Too many startup programs can drastically slow down your boot time and overall system responsiveness.

How to Fix:

  1. Presse Ctrl + Shift + Esc to open the Task Manager.

  2. Aller à la page Startup tab.

  3. Disable all non-essential programs by right-clicking and selecting Disable.

Focus on disabling things like chat apps, cloud sync tools (if not always needed), or third-party updaters.

Why It Works:

This reduces the workload on your system during startup, allowing essential apps like Office 2019 to load faster and run smoother.

2. Uninstall Bloatware and Unused Apps

Pre-installed apps or software you never use can consume system resources in the background.

How to Fix:

  1. Aller à Settings > Apps > Apps & features.

  2. Sort by Install Date ou Size.

  3. Uninstall anything you don’t use.

Examples of what to remove:

  • Trial antivirus software

  • Manufacturer-specific utilities you don’t use

  • Duplicate media players

Why It Works:

Fewer apps mean fewer background processes competing for memory and CPU.

3. Clean Up Hard Drive and Temp Files

Over time, Windows accumulates temporary files and cache data that can clutter your system and slow performance.

How to Fix:

  1. Presse Windows + R, type cleanmgr, press Enter.

  2. Select the system drive (usually C:).

  3. Check options like:

    • Temporary files

    • Recycle Bin

    • System cache

  4. Cliquez sur OK to delete selected files.

Alternatively, use Storage Sense via Settings > System > Storage.

Why It Works:

Freeing up disk space improves system responsiveness and reduces the chance of background disk activity slowing your computer.

4. Update Windows and Office 2019

Running outdated software can introduce bugs, compatibility issues, and security risks that affect performance.

How to Fix:

For Windows 10:

  1. Aller à Settings > Update & Security > Windows Update.

  2. Cliquez sur Check for updates and install available patches.

For Office 2019:

  1. Open any Office app (e.g., Word).

  2. Cliquez sur File > Account > Update Options > Update Now.

Why It Works:

Updates often include performance improvements and bug fixes that directly impact system and application speed.

5. Scan for Malware and Unwanted Programs

Malware, spyware, and adware are notorious for slowing down systems by consuming background resources.

How to Fix:

Use Windows Defender:

  1. Aller à Settings > Update & Security > Windows Security.

  2. Open Virus & Threat Protection.

  3. Run a Full Scan.

Or use a reputable third-party antivirus if needed.

Why It Works:

Malware can hijack your CPU, network bandwidth, and memory—removing it frees up these essential resources.

6. Optimize Virtual Memory (Paging File)

When your RAM gets maxed out, Windows uses a portion of your hard drive as “virtual memory.” Misconfigured settings can lead to performance issues.

How to Fix:

  1. Right-click This PC, choose Properties.

  2. Cliquez sur Advanced system settings > Performance > Settings.

  3. Aller à la page Advanced tab, click Change under Virtual Memory.

  4. Uncheck “Automatically manage paging file size.”

  5. Set:

    • Initial size: 1.5x your RAM

    • Maximum size: 3x your RAM

Example: For 8 GB RAM, set:

  • Initial: 12288 MB

  • Max: 24576 MB

  1. Cliquez sur Set → OK → Restart.

Why It Works:

This gives Windows a consistent space to work with, reducing lag and memory errors when multitasking or running Office applications.

7. Repair Office 2019 Installation

If only Office apps are slow or crashing, it might be an internal issue with the installation.

How to Fix:

  1. Aller à Control Panel > Programs > Programs and Features.

  2. Find Microsoft Office 2019, click on it.

  3. Cliquez sur Change, then choose Quick Repair.

If the problem persists, choose Online Repair (requires internet).

Why It Works:

This fixes missing or corrupted Office files without uninstalling the suite, resolving issues that cause crashes, freezing, or slow file operations.

Bonus Tips for Extra Speed

  • Upgrade to SSD: If you’re still using a traditional hard drive, switching to SSD can make a huge difference in speed.

  • Increase RAM: 8 GB is the minimum for Office-heavy use; 16 GB is ideal for multitasking or larger Excel/PowerPoint files.

  • Disable Background Apps: Go to Settings > Privacy > Background Apps and turn off apps you don’t need running in the background.

  • Turn Off Visual Effects:

    • Control Panel > System > Advanced system settings > Performance Settings > Adjust for best performance.

Slow performance doesn’t always mean your system is outdated—it often just needs a bit of fine-tuning. With a few adjustments to startup settings, memory management, software maintenance, and malware protection, you can dramatically improve both system and Office 2019 responsiveness on Windows 10 Professional + MS Office 2019 Pro Plus.

Implement these seven fixes step by step, and you’ll notice a smoother experience whether you’re drafting a proposal in Word, crunching numbers in Excel, or multitasking across several apps.

FAQ

  1. Why is Office 2019 running slow on my Windows 10 Pro PC?
     This can be due to insufficient RAM, outdated software, bloatware, or even corrupted Office files. Try the repair method and check memory usage.
  2. Can a virus cause Windows 10 to slow down?
     Yes, malware can run silently in the background, using up resources. Running a full antivirus scan is one of the most important fixes.
  3. How do I know which startup programs to disable?
     Use Task Manager to review the impact column—focus on disabling programs marked as “High impact” that aren’t necessary for your work.
  4. Will upgrading RAM improve performance with Office 2019?
     Absolutely. If you’re running multiple Office apps or large files, moving from 4 GB to 8 GB (or higher) will greatly enhance performance.
  5. Is it better to use SSD for Office work?
     Yes, an SSD significantly reduces load times for Windows, Office apps, and files—making your entire system feel faster and more responsive