1) Press “Windows Key + R” and Type “Firewall.cpl” and Press Enter.
2) Microsoft Windows 8 Firewall Window will Open.
3) On left hand side you will find “Turn Windows Firewall on or off”
Warning: You will need Administrator rights to disable firewall.
4) Click “Turn off Windows Firewall (not recommended)” under each network location and then Click “OK”
Step 2: Proxy Setting
1) Goto Control Panel. Microsoft Windows 7 : Press Win Key and then Select Control Panel from Right Pane. Windows 8 : Press Windows Key + Q and Type “Control” And Click on it. 2) In Control Panel Window Click on “Internet Options”. 3) Select Connections Tab and then Choose LAN Setting.
4) Uncheck “Use a proxy server for your LAN” if its switched ON.
Step 3: Disable Antivirus
– Open Your Antivrus – Disable it till the Office 365 installation is going on. Check antivirus vendor website for more details.
Step 4: Try the installation again
In most case 30043-11 error code in Office 365 should be resolved by now, if however the problem still persists please get your system checked by an expert.
If you are not able to resolve the issue following above steps, you can contact our 24×7 Chat Support for help.