What Is File Extension Diagcab?

Files with the file extension .diagcab are files used by the Microsoft Support Diagnostic Tool (also referred to as the WTP Wizard), a Windows Troubleshooting Platform program used to locate and fix hardware and software problems in Windows; contains a .CAB file and is used specifically for diagnosing and repairing computer problems.

How To Fix and Open .Diagcab Files?

If you are unable to open/run file extension Diagcab chances are you are experiencing registry problems. Now there's a completely automatic way to repair the registry.

With one click of the Fix Errors button, Speedy PC Pro repairs file errors, broken file links, browser runtime error codes, and increases PC performance!

With over a million downloads and counting, Speedy PC Pro is the tool computer expert's consistently choose to quickly and safely repair Windows problems.

Click the button below to download.

download arrow Free Download: File Extension .Diagcab Repair Tool(2Mb) 

Windows 98SE, 2000, XP, Vista, 7 and 8 ready

tool to open file extension diagcab

Step 1
Download & Install Speedy PC Pro

Step 2
Click the 'Scan' Button

Step 3
Click 'Fix Errors' and you're done.

  User Comments

AngelaB says: today
Worked perfectly. Thanks!

Gadgetguppy says: yesterday
Finally something that works!

PAUL says: 2 days ago
quickly fixed all my pc errors...amazing

Man76 says: 2 days ago
Thank goodness!


What is Speedy PC Pro?

SpeedyPC Pro is an innovative software product packed with advanced features to help you optimize your PC and fix problems/errors.

Every good mechanic has a toolbox fully stocked with what he needs to get the job done. Consider SpeedyPC Pro your PC cleaning, repair and optimization toolbox. The program’s main scan takes care of the common problems, such as registry errors, that make computers perform poorly. SpeedyPC Pro also has many advanced tools to improve startup times, find the right program to open file extensions, defragment your computer’s memory and eject unwanted browser add-ons

Benefits of using SpeedyPC Pro

  • Clean your PC of the ActiveX and registry errors and clutter that slow it down.
  • Protect yourself and your PC by removing malware and privacy files.
  • Help opening unknown file extensions with File Manger tool.
  • Optimize memory by defragging. Improves file save and recall times.
  • Bonus SpeedyPC Pro tools to improve your computer's performance.

Optimized PC Performance in 3 Easy Steps!

Step 1: Scan for Problems

speedy pc pro scan for issues

Step 2: View Results

scan results

Step 3: Have SpeedyPC Pro Clean

clean PC

Step 4: It’s All Done

pc clean