There could be a few reasons why Adguard caused a slowdown on your computer. Here are some possible causes and solutions:
1. Outdated Adguard version: Sometimes an older version of Adguard can cause your computer to slow down. Check if you have the latest version of Adguard installed and update it if necessary.
2. Conflict with other software: Adguard may conflict with other security software installed on your computer, causing a slowdown. Try disabling other security software to see if Adguard works better.
3. Resource-intensive settings: Adguard has many customizable settings that can affect its performance. Check if you have set any heavy-duty settings that may be bogging down your system.
4. System resources: If your computer does not have enough RAM or CPU power, Adguard could cause a slowdown. Make sure your computer meets the minimum system requirements for Adguard.
5. Malware infection: It's possible that your computer has a malware infection that Adguard is trying to block, causing a slowdown. Run a full system scan with your antivirus software to check for any malware.
I hope this helps you identify the issue and resolve it. If you need further assistance, please let me know.