Avast Compatibility in Windows 7
Microsoft's Windows 7 Compatibility website shows version 4 of Avast runs on 32-bit and 64-bit editions of Windows 7. This means that the newer version of Avast, which is Version 5, is also compatible with Windows 7. Using the latest product version is recommended
Avast has caused performance issues in Windows 7 startup
Some Avast users have reported that Avast will not load or start in Windows 7. Before fixing the issue, you should verify by checking the event logs in Windows 7 or by opening the Performance Information and Tools in Windows 7.
Open the Control Panel in Windows then select System and Maintenance
Click on the Performance Information and Tools, and then click Advanced tools in the left pane.
Under Performance issues, ensure that there is no report that Avast is causing performance degradation.
- Next, open the Event Viewer in Windows by typing eventvwr.msc in the run command/box.
Locate for any recent Diagnostic and Performance event/log that says "This application took longer than usual to start up, resulting in performance degradation in the system startup process: File Name: AvastSvc.exe". If you find such entry, proceed to below troubleshooting.
To solve the problem of delayed startup or not loading of Avast in Windows, try the following possible solutions:
- Boot the computer to safe mode
Manually open Avast, and then click on "Settings" which is located in the upper right-hand area of Avast user interface.
Click the "Troubleshooting" menu in the left pane, and then put a check before the box for "Load Avast! services only after loading other system services". Click OK to apply
If the above troubleshooting has helped, report the issue to Avast with your system information to help the developers identify the issue, and provide a permanent fix.