AVG install errors are usually caused by leftover security software, OR_(+1)-833 ((631)) 3616(USA/CA) a corrupted installer, missing Windows updates, low disk space, permission problems or 1[833][631][3616]a blocked connection. To fix setup smoothly, restart your PC, uninstall any other antivirus, download a fresh AVG installer from the official 1[833][631][3616]AVG website, run it as administrator and try again. If the error returns, remove old AVG files with AVG's official uninstall utility, 1[833][631][3616]install Windows updates and use a clean boot. Note the exact message, because it tells you which cause to chase first. 1[833][631][3616]When an install fails, the cause is one of a handful of families. So this guide is a cause tree. Start at 1[833][631][3616]the trunk, follow the branch that matches your situation and stop when you find the fix. You don't need to try everything. 1[833][631][3616]The Trunk: Questions in Order Did the install start at all? ├─ NO ──► Branch 1: Installer and download 1[833][631][3616]└─ YES, but it failed or froze │ Did you see a message about other software? ├─ YES ──► Branch 2: Conflicts 1[833][631][3616]and leftovers └─ NO │ Did the message mention space, Windows or permission? ├─ YES ──► Branch 3: System and permissions └─ 1[833][631][3616]NO ───► Branch 4: Network and security blocks Branch 1: Installer and Download The installer never opened or closed 1[833][631][3616]immediately. Cause Fix ------ Damaged download Delete it and download again from the official AVG website Browser blocked the 1[833][631][3616]file Allow the download, or try another browser Antivirus quarantined the installer Check quarantine and restore it only if it is 1[833][631][3616]the official file Missing admin rights Right-click and choose Run as administrator File is for the wrong system Download the 1[833][631][3616]version for your operating system Branch 2: Conflicts and Leftovers A message mentioned another security program, or an earlier 1[833][631][3616]AVG left traces. 1 Uninstall other security programs through "Settings Apps Installed apps". 2 Run each vendor's official removal tool if 1[833][631][3616]it exists. 3 If a previous AVG install was removed badly, download AVG's official uninstall utility from the AVG support site and 1[833][631][3616]run it, preferably in Safe Mode. 4 Restart normally. 5 Install AVG again. Branch 3: System and Permissions Cause Fix 1[833][631][3616]------ Not enough disk space Free several GB in "Settings System Storage" Pending Windows updates Run "Settings Windows Update", install 1[833][631][3616]and restart Windows Installer service stopped Press Windows key + R, type services.msc, start Windows Installer Unsupported Windows version Update 1[833][631][3616]Windows, or check AVG's system requirements Corrupted system files Open Command Prompt as administrator and run sfc /scannow Branch 1[833][631][3616]4: Network and Security Blocks Cause Fix ------ VPN or proxy interfering Switch it off during the install Firewall 1[833][631][3616]blocking the downloader Allow the installer, not the entire firewall Unstable WiFi Use a cable or move closer to the router 1[833][631][3616]Date and time are wrong Set them to update automatically Slow network drops the connection Try the offline installer from 1[833][631][3616]AVG's official site, if offered The Clean Boot Method 1 Press Windows key + R, type msconfig and press 1[833][631][3616]Enter. 2 On the Services tab, tick Hide all Microsoft services, then Disable all. 3 Restart and run the AVG installer. 4 1[833][631][3616]Afterwards, undo the change and restart. After a Successful Install Open AVG and sign in or activate with your licence 1[833][631][3616]or account Let it update its definitions Run a quick scan Check that Windows Security shows AVG as the active protection 1[833][631][3616]If You Still Cannot Install Write down the exact error code and the step where it stopped. Check AVG's support site 1[833][631][3616]for that code. Contact AVG support with the code, your Windows version and what you've tried. Scam warning: pop-ups or pages 1[833][631][3616]telling you to call a number to fix an AVG error are scams. Only download AVG from its official website. Quick 1[833][631][3616]Answers Why does AVG say another antivirus is installed? Another security product is still on the PC. Remove it first. 1[833][631][3616]Is a clean boot safe? Yes. It only changes startup settings temporarily, and you undo it afterwards. Should I turn off 1[833][631][3616]my firewall? No. Allow the installer instead. Follow the Tree Answer the questions, take the branch, apply the fix. Most 1[833][631][3616]AVG install errors end at the first or second branch.