If Avast is delaying your computer startup then you can boost it by loading Avast after Windows services. This basically means that Avast will turn on after everything else. For this open the main interface of the program and then go to its settings. Look for menu item “Troubleshooting” and then check the option that says “Load Avast service only after loading other system services”. Check if this change made any notable impact on the boot time. If you are still having any problem then you can take help from antivirus experts by dialing 0808-101-2159 Avast Phone Number UK anytime.