How to Fix Power Query Freezing or Running Slowly in Excel
Question details
The user experiences slow performance, freezing, or crashing when using Power Query in Excel, despite having sufficient computer memory.
- Product
- Microsoft Excel
- Device & OS
- not provided
- Scenario
- Processing and transforming data using Power Query on a work computer.
- Observed behavior
- Power Query loads very slowly, freezes intermittently, or causes Excel to crash completely during data operations.
Before troubleshooting, ensure you have saved all open workbooks and close any unnecessary background applications that might be consuming excessive CPU or network resources.
Run Excel in Safe Mode and Disable Problematic Add-ins
Starting Excel in Safe Mode bypasses add-ins, helping you determine if a third-party extension is causing Power Query to freeze.
Incompatible or outdated Office add-ins frequently conflict with Power Query operations, especially in enterprise environments.
Press Windows + R on your keyboard, type 'excel /safe' in the Run dialog, and press Enter to open Excel.
Attempt to run your Power Query data transformations. If the process runs smoothly without freezing, an add-in is likely the culprit.
Go to File > Options > Add-ins. At the bottom of the window, select 'COM Add-ins' from the Manage drop-down menu and click 'Go'.
Uncheck all listed add-ins and click OK. Restart Excel normally, then re-enable the add-ins one by one to identify which specific extension causes the freezing.
Test VPN Connection and Perform a Clean Boot
Corporate VPNs and background security software can intercept network traffic, significantly slowing down Power Query operations.
Update Excel and Repair the Office Installation
An outdated or corrupted Office installation can lead to Power Query instability, bugs, and random crashes.
Try WPS Office for Fast and Lightweight Data Processing
If Microsoft Excel continues to freeze or run slowly, consider switching to WPS Office. It is a highly compatible, lightweight alternative that handles large spreadsheets smoothly without the heavy resource demands.
- 1. Download WPS Office: Visit the official WPS website and download the free WPS Office installer.
- 2. Install and Launch: Follow the lightweight installation wizard, then open WPS Spreadsheets.
- 3. Open Your Excel File: Drag and drop your existing .xlsx or .csv files directly into the interface to begin editing smoothly.
Frequently Asked Questions
Why does Power Query use so much memory?
Power Query loads data into memory to perform transformations efficiently. Complex queries, large datasets, and unoptimized transformation steps can cause it to consume available RAM rapidly, leading to slowdowns.
How can I check my exact Excel version for troubleshooting?
Open Excel, click on 'File' in the top-left corner, select 'Account' (or 'Office Account'), and look under 'Product Information' for your exact version and build number.
Will clearing the Power Query cache improve performance?
Yes, clearing the cache can resolve certain slowdowns. Go to Data > Get Data > Query Options > Data Load, and click 'Clear Cache' under the Data Cache Management section.
Does my corporate VPN directly affect Excel's performance?
If your Power Query connects to external data sources, web APIs, or cloud databases, a slow or restricted VPN can drastically reduce data retrieval speed, causing Excel to appear frozen while waiting for a response.
