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# 浏览器网络连接问题诊断和修复脚本
# 需要以管理员权限运行
Write-Host "浏览器网络连接问题诊断修复工具" -ForegroundColor Green
Write-Host "======================================" -ForegroundColor Yellow
Write-Host ""
# 检查管理员权限
if (-NOT ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
Write-Host "错误: 请以管理员权限运行此脚本!" -ForegroundColor Red
Read-Host "按回车键退出"
exit
}
try {
# 1. 检查网络连接状态
Write-Host "1. 检查网络连接状态..." -ForegroundColor Cyan
$networkAdapters = Get-NetAdapter | Where-Object {$_.Status -eq "Up"}
if ($networkAdapters) {
Write-Host " ✓ 网络适配器正常:" -ForegroundColor Green
$networkAdapters | ForEach-Object { Write-Host " - $($_.Name)" -ForegroundColor Gray }
} else {
Write-Host " ✗ 未发现活动的网络适配器" -ForegroundColor Red
Write-Host " 请检查网络连接是否正常" -ForegroundColor Yellow
}
# 2. 检查DNS设置
Write-Host "2. 检查DNS设置..." -ForegroundColor Cyan
$dnsServers = Get-DnsClientServerAddress | Where-Object {$_.ServerAddresses -ne $null}
if ($dnsServers) {
Write-Host " ✓ DNS服务器配置正常" -ForegroundColor Green
$dnsServers | ForEach-Object {
if ($_.ServerAddresses) {
Write-Host " - $($_.InterfaceAlias): $($_.ServerAddresses -join ', ')" -ForegroundColor Gray
}
}
} else {
Write-Host " ⚠ DNS服务器未配置" -ForegroundColor Yellow
}
# 3. 检查和修复代理设置
Write-Host "3. 检查代理设置..." -ForegroundColor Cyan
$regPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings"
$proxySettings = Get-ItemProperty -Path $regPath
Write-Host " 当前代理状态:" -ForegroundColor White
Write-Host " 代理启用: $($proxySettings.ProxyEnable)" -ForegroundColor Gray
Write-Host " 代理服务器: $($proxySettings.ProxyServer)" -ForegroundColor Gray
Write-Host " 自动配置: $($proxySettings.AutoConfigURL)" -ForegroundColor Gray
if ($proxySettings.ProxyEnable -eq 1) {
Write-Host " 发现代理已启用，正在禁用..." -ForegroundColor Yellow
Set-ItemProperty -Path $regPath -Name "ProxyEnable" -Value 0
if ($proxySettings.ProxyServer) {
Remove-ItemProperty -Path $regPath -Name "ProxyServer" -ErrorAction SilentlyContinue
}
Write-Host " ✓ 代理已禁用" -ForegroundColor Green
} else {
Write-Host " ✓ 代理未启用" -ForegroundColor Green
}
# 4. 检查Hosts文件
Write-Host "4. 检查Hosts文件..." -ForegroundColor Cyan
$hostsPath = "$env:windir\System32\drivers\etc\hosts"
if (Test-Path $hostsPath) {
$hostsContent = Get-Content $hostsPath | Where-Object {$_ -notmatch "^#" -and $_ -notmatch "^\s*$"}
$defaultEntries = @("127.0.0.1 localhost", "::1 localhost")
$customEntries = $hostsContent | Where-Object { $defaultEntries -notcontains $_.Trim() }
if ($customEntries) {
Write-Host " ⚠ 发现自定义Hosts条目:" -ForegroundColor Yellow
$customEntries | ForEach-Object { Write-Host " $_" -ForegroundColor Gray }
$backupHosts = Read-Host " 是否备份并清理Hosts文件？(Y/N)"
if ($backupHosts -eq 'Y' -or $backupHosts -eq 'y') {
Copy-Item $hostsPath "$hostsPath.backup.$(Get-Date -Format 'yyyyMMdd_HHmmss')"
$defaultContent = @(
"# Copyright (c) 1993-2009 Microsoft Corp.",
"#",
"# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.",
"#",
"127.0.0.1 localhost",
"::1 localhost"
)
$defaultContent | Set-Content $hostsPath
Write-Host " ✓ Hosts文件已重置，原文件已备份" -ForegroundColor Green
}
} else {
Write-Host " ✓ Hosts文件正常" -ForegroundColor Green
}
}
# 5. 清除DNS缓存
Write-Host "5. 清除DNS缓存..." -ForegroundColor Cyan
try {
Clear-DnsClientCache
Write-Host " ✓ DNS缓存已清除" -ForegroundColor Green
} catch {
Write-Host " ✗ DNS缓存清除失败: $($_.Exception.Message)" -ForegroundColor Red
}
# 6. 重置网络组件
Write-Host "6. 重置网络组件..." -ForegroundColor Cyan
# 重置Winsock
Write-Host " 重置Winsock..." -ForegroundColor White
$winsockResult = netsh winsock reset 2>&1
if ($LASTEXITCODE -eq 0) {
Write-Host " ✓ Winsock重置成功" -ForegroundColor Green
} else {
Write-Host " ⚠ Winsock重置可能失败" -ForegroundColor Yellow
}
# 重置TCP/IP
Write-Host " 重置TCP/IP..." -ForegroundColor White
$tcpipResult = netsh int ip reset 2>&1
if ($LASTEXITCODE -eq 0) {
Write-Host " ✓ TCP/IP重置成功" -ForegroundColor Green
} else {
Write-Host " ⚠ TCP/IP重置可能失败" -ForegroundColor Yellow
}
# 7. 检查防火墙设置
Write-Host "7. 检查Windows防火墙..." -ForegroundColor Cyan
$firewallProfiles = Get-NetFirewallProfile
$blockingRules = 0
foreach ($profile in $firewallProfiles) {
if ($profile.Enabled -and $profile.DefaultInboundAction -eq "Block") {
$blockingRules++
}
Write-Host " $($profile.Name): $($profile.Enabled) (入站: $($profile.DefaultInboundAction))" -ForegroundColor Gray
}
if ($blockingRules -gt 0) {
Write-Host " ⚠ 防火墙可能阻止某些连接" -ForegroundColor Yellow
} else {
Write-Host " ✓ 防火墙设置正常" -ForegroundColor Green
}
# 8. 检查可能影响网络的程序
Write-Host "8. 检查可能影响网络的程序..." -ForegroundColor Cyan
$networkPrograms = @("360", "qq", "baidu", "tencent", "kaspersky", "avast", "norton", "vpn", "proxy")
$foundPrograms = @()
Get-Process | ForEach-Object {
$processName = $_.ProcessName.ToLower()
foreach ($program in $networkPrograms) {
if ($processName -like "*$program*") {
$foundPrograms += $_.ProcessName
break
}
}
}
if ($foundPrograms) {
Write-Host " ⚠ 发现可能影响网络的程序:" -ForegroundColor Yellow
$foundPrograms | Sort-Object -Unique | ForEach-Object { Write-Host " - $_" -ForegroundColor Gray }
Write-Host " 建议检查这些程序的网络设置或临时关闭" -ForegroundColor Yellow
} else {
Write-Host " ✓ 未发现可疑程序" -ForegroundColor Green
}
# 9. 网络连接测试
Write-Host "9. 测试网络连接..." -ForegroundColor Cyan
$testSites = @(
@{Name="Google DNS"; Address="8.8.8.8"; Port=53},
@{Name="CloudFlare DNS"; Address="1.1.1.1"; Port=53},
@{Name="百度"; Address="www.baidu.com"; Port=80},
@{Name="Google"; Address="www.google.com"; Port=80}
)
foreach ($site in $testSites) {
try {
$result = Test-NetConnection -ComputerName $site.Address -Port $site.Port -InformationLevel Quiet -WarningAction SilentlyContinue
if ($result) {
Write-Host " ✓ $($site.Name) 连接正常" -ForegroundColor Green
} else {
Write-Host " ✗ $($site.Name) 连接失败" -ForegroundColor Red
}
} catch {
Write-Host " ✗ $($site.Name) 测试出错" -ForegroundColor Red
}
}
# 10. 重启浏览器
Write-Host "10. 重启浏览器..." -ForegroundColor Cyan
$browsers = @("chrome", "firefox", "msedge", "iexplore", "opera", "brave")
$closedBrowsers = @()
foreach ($browser in $browsers) {
$processes = Get-Process -Name $browser -ErrorAction SilentlyContinue
if ($processes) {
$processes | Stop-Process -Force
$closedBrowsers += $browser
Write-Host " ✓ 已关闭 $browser" -ForegroundColor Green
}
}
if ($closedBrowsers) {
Write-Host " 等待3秒后重新启动浏览器..." -ForegroundColor White
Start-Sleep 3
# 重新启动Chrome（如果之前运行过）
if ($closedBrowsers -contains "chrome") {
try {
Start-Process "chrome" -ErrorAction SilentlyContinue
Write-Host " ✓ Chrome已重新启动" -ForegroundColor Green
} catch {
Write-Host " ⚠ Chrome重新启动失败，请手动启动" -ForegroundColor Yellow
}
}
} else {
Write-Host " ✓ 未发现正在运行的浏览器" -ForegroundColor Green
}
# 修复完成总结
Write-Host ""
Write-Host "======================================" -ForegroundColor Yellow
Write-Host "修复完成!" -ForegroundColor Green
Write-Host ""
Write-Host "已执行的修复操作:" -ForegroundColor White
Write-Host "- 禁用了系统代理设置" -ForegroundColor Gray
Write-Host "- 清除了DNS缓存" -ForegroundColor Gray
Write-Host "- 重置了Winsock和TCP/IP" -ForegroundColor Gray
Write-Host "- 重启了浏览器进程" -ForegroundColor Gray
Write-Host ""
Write-Host "建议操作:" -ForegroundColor White
Write-Host "1. 重启计算机使网络重置完全生效" -ForegroundColor Yellow
Write-Host "2. 如果问题仍存在，检查路由器/调制解调器" -ForegroundColor Yellow
Write-Host "3. 临时关闭防病毒软件测试" -ForegroundColor Yellow
Write-Host "4. 检查网络供应商是否有故障" -ForegroundColor Yellow
# 询问是否重启
Write-Host ""
$reboot = Read-Host "是否现在重启计算机？(Y/N)"
if ($reboot -eq 'Y' -or $reboot -eq 'y') {
Write-Host "正在重启计算机..." -ForegroundColor Green
Restart-Computer -Force
}
} catch {
Write-Host "脚本执行出错: $($_.Exception.Message)" -ForegroundColor Red
}
Write-Host ""
Write-Host "按任意键退出..." -ForegroundColor Gray
$null = $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
